{"id":1270,"date":"2016-05-21T12:22:30","date_gmt":"2016-05-21T10:22:30","guid":{"rendered":"https:\/\/developers.sd\/%d8%aa%d8%b7%d8%a8%d9%8a%d9%82-%d8%a7%d9%84%d8%a8%d8%b1%d9%85%d8%ac%d8%a9-%d9%83%d8%a7%d8%a6%d9%86%d9%8a%d8%a9-%d8%a7%d9%84%d8%aa%d9%88%d8%ac%d9%87-%d9%81%d9%8a-%d9%84%d8%ba%d8%a9-%d8%b3%d9%8a-2\/"},"modified":"2020-01-16T10:48:51","modified_gmt":"2020-01-16T08:48:51","slug":"%d8%aa%d8%b7%d8%a8%d9%8a%d9%82-%d8%a7%d9%84%d8%a8%d8%b1%d9%85%d8%ac%d8%a9-%d9%83%d8%a7%d8%a6%d9%86%d9%8a%d8%a9-%d8%a7%d9%84%d8%aa%d9%88%d8%ac%d9%87-%d9%81%d9%8a-%d9%84%d8%ba%d8%a9-%d8%b3%d9%8a-2","status":"publish","type":"post","link":"https:\/\/developers.sd\/?p=1270","title":{"rendered":"\u062a\u0637\u0628\u064a\u0642 \u0627\u0644\u0628\u0631\u0645\u062c\u0629 \u0643\u0627\u0626\u0646\u064a\u0629 \u0627\u0644\u062a\u0648\u062c\u0647 \u0641\u064a \u0644\u063a\u0629 \u0633\u064a \u0634\u0627\u0631\u0628 #C  &#8211; \u0627\u0644\u062c\u0632\u0621 \u0627\u0644\u062b\u0627\u0646\u064a"},"content":{"rendered":"<p><img decoding=\"async\" src=\"https:\/\/academy.hsoub.com\/uploads\/monthly_2016_05\/learn-csharp-oop.png.f1939b7b8c0f9c7f273da17ec491440f.png\"\/><\/p>\n<p> \t \u062a\u062d\u062f\u062b\u0646\u0627 \u0641\u064a \u0627\u0644\u062f\u0631\u0633 \u0627\u0644\u0633\u0627\u0628\u0642 \u0639\u0646 <a href=\"https:\/\/academy.hsoub.com\/programming\/c-sharp\/%D8%AA%D8%B7%D8%A8%D9%8A%D9%82-%D8%A7%D9%84%D8%A8%D8%B1%D9%85%D8%AC%D8%A9-%D9%83%D8%A7%D8%A6%D9%86%D9%8A%D8%A9-%D8%A7%D9%84%D8%AA%D9%88%D8%AC%D9%87-%D9%81%D9%8A-%D9%84%D8%BA%D8%A9-%D8%B3%D9%8A-%D8%B4%D8%A7%D8%B1%D8%A8-c-%D8%A7%D9%84%D8%AC%D8%B2%D8%A1-%D8%A7%D9%84%D8%A3%D9%88%D9%84-r330\/\" rel=\"noreferrer noopener\" target=\"_blank\">\u0627\u0644\u0645\u0628\u0627\u062f\u0626 \u0627\u0644\u0623\u0648\u0644\u064a\u0651\u0629 \u0644\u062a\u0637\u0628\u064a\u0642 \u0645\u0641\u0627\u0647\u064a\u0645 \u0627\u0644\u0628\u0631\u0645\u062c\u0629 \u0643\u0627\u0626\u0646\u064a\u0651\u0629 \u0627\u0644\u062a\u0648\u062c\u0651\u0647 \u0641\u064a \u0633\u064a \u0634\u0627\u0631\u0628<\/a>\u060c \u062d\u064a\u062b \u062a\u0639\u0644\u0651\u0645\u0646\u0627 \u0643\u064a\u0641\u064a\u0651\u0629 \u0625\u0646\u0634\u0627\u0621 \u0627\u0644\u0623\u0635\u0646\u0627\u0641 \u0648\u0623\u0639\u0636\u0627\u0626\u0647\u0627\u060c \u0648\u0625\u0646\u0634\u0627\u0621 \u0627\u0644\u0643\u0627\u0626\u0646\u0627\u062a \u0645\u0646 \u0627\u0644\u0623\u0635\u0646\u0627\u0641 \u0648\u0627\u0644\u062a\u0639\u0627\u0645\u0644 \u0645\u0639\u0647\u0627. <\/p>\n<p> \t\u0633\u0646\u062a\u0627\u0628\u0639 \u0641\u064a \u0647\u0630\u0627 \u0627\u0644\u062f\u0631\u0633 \u0627\u0644\u062d\u062f\u064a\u062b \u0639\u0646 \u062a\u0637\u0628\u064a\u0642 \u0645\u0628\u0627\u062f\u0626 \u0627\u0644\u0628\u0631\u0645\u062c\u0629 \u0643\u0627\u0626\u0646\u064a\u0651\u0629 \u0627\u0644\u062a\u0648\u062c\u0651\u0647 \u0641\u064a \u0633\u064a \u0634\u0627\u0631\u0628 \u062d\u064a\u062b \u0633\u0646\u062a\u0646\u0627\u0648\u0644 \u0645\u064f\u062d\u062f\u0651\u062f \u0627\u0644\u0648\u0635\u0648\u0644 private (\u062a\u0646\u0627\u0648\u0644\u0646\u0627 \u0645\u062d\u062f\u0651\u062f \u0627\u0644\u0648\u0635\u0648\u0644 public \u0641\u064a \u0627\u0644\u062f\u0631\u0633 \u0627\u0644\u0633\u0627\u0628\u0642). \u0648\u0633\u0646\u062a\u062d\u062f\u0651\u062b \u0623\u064a\u0636\u064b\u0627 \u0639\u0646 \u0627\u0644\u062e\u0635\u0627\u0626\u0635 Properties \u0643\u0646\u0648\u0639 \u062c\u062f\u064a\u062f \u0645\u0646 \u0623\u0639\u0636\u0627\u0621 \u0627\u0644\u0635\u0646\u0641\u060c \u0648\u0627\u0644\u0641\u0631\u0642 \u0628\u064a\u0646\u0647\u0627 \u0648\u0628\u064a\u0646 \u062d\u0642\u0648\u0644 \u0627\u0644\u0628\u064a\u0627\u0646\u0627\u062a Data Fields. \u0648\u0633\u0646\u062e\u062a\u0645 \u0647\u0630\u0627 \u0627\u0644\u062f\u0631\u0633 \u0628\u0627\u0644\u062d\u062f\u064a\u062b \u0639\u0646 \u0627\u0644\u0623\u0639\u0636\u0627\u0621 \u0627\u0644\u0633\u0627\u0643\u0646\u0629 Static Members \u0641\u064a \u0627\u0644\u0635\u0646\u0641. <\/p>\n<p> \t<img decoding=\"async\" src=\"https:\/\/academy.hsoub.com\/uploads\/monthly_2016_05\/learn-csharp-oop.png.46e656d2c9232bbe0b3b7b4e696e6d7b.png\" alt=\"learn-csharp-oop.png\"\/><\/p>\n<h2> \t\u0627\u0644\u062e\u0635\u0627\u0626\u0635 Properties <\/h2>\n<p> \t\u0644\u0644\u062e\u0635\u0627\u0626\u0635 \u0648\u0644\u062d\u0642\u0648\u0644 \u0627\u0644\u0628\u064a\u0627\u0646\u0627\u062a \u0627\u0644\u0645\u0639\u0646\u0649 \u0627\u0644\u0645\u0646\u0637\u0642\u064a\u0651 \u0646\u0641\u0633\u0647 \u0641\u064a \u0627\u0644\u0628\u0631\u0645\u062c\u0629 \u0643\u0627\u0626\u0646\u064a\u0651\u0629 \u0627\u0644\u062a\u0648\u062c\u0651\u0647\u060c \u0625\u0644\u0651\u0627 \u0623\u0646\u0651 \u0633\u064a \u0634\u0627\u0631\u0628 \u062a\u0645\u064a\u0651\u0632 \u0628\u064a\u0646\u0647\u0645\u0627 \u0645\u0646 \u0627\u0644\u0646\u0627\u062d\u064a\u0629 \u0627\u0644\u0639\u0645\u0644\u064a\u0651\u0629. \u0644\u0644\u062e\u0635\u0627\u0626\u0635 \u0641\u064a \u0633\u064a \u0634\u0627\u0631\u0628 \u0645\u0631\u0648\u0646\u0629 \u0623\u0643\u0628\u0631\u060c \u062d\u064a\u062b \u0645\u0646 \u0627\u0644\u0645\u0645\u0643\u0646 \u062a\u0646\u0641\u064a\u0630 \u0639\u0628\u0627\u0631\u0627\u062a \u0628\u0631\u0645\u062c\u064a\u0651\u0629 \u0639\u0646\u062f \u0625\u0633\u0646\u0627\u062f \u0642\u064a\u0645\u0629 \u0625\u0644\u0649 \u062e\u0627\u0635\u064a\u0651\u0629 \u0623\u0648 \u062d\u062a\u0649 \u0639\u0646\u062f \u0627\u0644\u0642\u0631\u0627\u0621\u0629 \u0645\u0646\u0647\u0627. \u0643\u0645\u0627 \u0645\u0646 \u0627\u0644\u0645\u0645\u0643\u0646 \u0623\u0646 \u0646\u062c\u0639\u0644 \u0625\u062d\u062f\u0649 \u0627\u0644\u062e\u0648\u0627\u0635 \u0642\u0627\u0628\u0644\u0629 \u0644\u0644\u0642\u0631\u0627\u0621\u0629 \u0641\u0642\u0637 \u0623\u0648 \u062d\u062a\u0649 \u0642\u0627\u0628\u0644\u0629 \u0644\u0644\u0643\u062a\u0627\u0628\u0629 \u0641\u0642\u0637 (\u0648\u0644\u0648 \u0623\u0646\u0651\u0647 \u0623\u0645\u0631 \u0646\u0627\u062f\u0631 \u0627\u0644\u062d\u062f\u0648\u062b). \u0644\u0641\u0647\u0645 \u0647\u0630\u0647 \u0627\u0644\u0645\u0632\u0627\u064a\u0627 \u0628\u0634\u0643\u0644 \u062c\u064a\u0651\u062f \u0633\u0623\u0633\u062a\u0639\u064a\u0631 \u0627\u0644\u0628\u0631\u0646\u0627\u0645\u062c Lesson06_02 \u0645\u0646 \u0627\u0644\u062f\u0631\u0633 \u0627\u0644\u0633\u0627\u0628\u0642\u060c \u0648\u0623\u062c\u0631\u064a \u0639\u0644\u064a\u0647 \u0628\u0639\u0636 \u0627\u0644\u062a\u0639\u062f\u064a\u0644\u0627\u062a \u0644\u0625\u062f\u062e\u0627\u0644 \u0645\u0641\u0647\u0648\u0645 \u0627\u0644\u062e\u0635\u0627\u0626\u0635. <\/p>\n<pre> 1   using System; 2 3   namespace Lesson07_01 4   { 5 6       class Employee 7       { 8           private string firstName; 9           private string lastName; 10          private double salary; 11 12          public string FirstName 13          { 14              get 15              { 16                  return this.firstName; 17              } 18              set 19              { 20                  this.firstName = value; 21              } 22          } 23  24          public string LastName 25          { 26              get 17              { 28                  return this.lastName; 29              } 30              set 31              { 32                  this.lastName = value; 33              } 34          } 35   36 37          public double Salary 38          { 39              get 40              { 41                  return this.salary; 42              } 43              set 44              { 45                  this.salary = value; 46              } 47          } 48 49          public string DisplayInfo() 50          { 51              string result = string.Format(&quot;{0} {1} - Salary: {2:N0}&quot;, 52                  this.FirstName, this.LastName, this.Salary); 53 54              return result; 55          } 56 57          public Employee(string firstName, string lastName, double salary) 58          { 59              this.FirstName = firstName; 60              this.LastName = lastName; 61              this.Salary = salary; 62          } 63 64          public Employee() 65          { 66 67          } 68      } 69 70 71      class Program 72      { 73          static void Main(string[] args) 74          { 75              Employee employee1, employee2; 76 77              employee1 = new Employee(&quot;Mohammad&quot;, &quot;Mansoor&quot;, 1000); 78              employee2 = new Employee(&quot;Saleh&quot;, &quot;Mahmoud&quot;, 2500); 79 80              Console.WriteLine(&quot;First Employee: {0}&quot;, employee1.DisplayInfo()); 81              Console.WriteLine(&quot;Second Employee: {0}&quot;, employee2.DisplayInfo()); 82          } 83      } 84  }<\/pre>\n<p> \t\u0639\u0646\u062f \u062a\u0646\u0641\u064a\u0630 \u0627\u0644\u0628\u0631\u0646\u0627\u0645\u062c Lesson07_01 \u0633\u0646\u062d\u0635\u0644 \u0639\u0644\u0649 \u0646\u0641\u0633 \u0627\u0644\u062e\u0631\u062c \u0627\u0644\u0630\u064a \u062d\u0635\u0644\u0646\u0627 \u0639\u0644\u064a\u0647 \u0641\u064a \u0627\u0644\u0628\u0631\u0646\u0627\u0645\u062c Lesson06_02. \u0644\u0642\u062f \u0623\u062c\u0631\u064a\u0646\u0627 \u0641\u064a \u0627\u0644\u062d\u0642\u064a\u0642\u0629 \u0628\u0639\u0636 \u0627\u0644\u062a\u0639\u062f\u064a\u0644\u0627\u062a \u0627\u0644\u062a\u064a \u062a\u0628\u062f\u0648 \u0644\u0644\u0648\u0647\u0644\u0629 \u0627\u0644\u0623\u0648\u0644\u0649 \u0623\u0646\u0651\u0647\u0627 \u0644\u064a\u0633\u062a \u0630\u0627\u062a \u0645\u063a\u0632\u0649. \u0644\u0642\u062f \u0627\u0633\u062a\u0628\u062f\u0644\u0646\u0627 \u0645\u062d\u062f\u0651\u062f \u0627\u0644\u0648\u0635\u0648\u0644 \u0644\u0644\u062d\u0642\u0648\u0644 \u0641\u064a \u0627\u0644\u0623\u0633\u0637\u0631 \u0645\u0646 8 \u062d\u062a\u0649 10 \u0644\u064a\u0635\u0628\u062d private \u0628\u062f\u0644\u064b\u0627 \u0645\u0646 public (\u0643\u0645\u0627 \u0643\u0627\u0646 \u0627\u0644\u0648\u0636\u0639 \u0641\u064a \u0627\u0644\u0628\u0631\u0646\u0627\u0645\u062c Lesson06_02). \u064a\u0641\u064a\u062f \u0645\u064f\u062d\u062f\u0651\u062f \u0627\u0644\u0648\u0635\u0648\u0644 \u0647\u0630\u0627 \u0641\u064a \u062c\u0639\u0644 \u0627\u0644\u062d\u0642\u0644 \u062e\u0627\u0635\u0651\u064b\u0627 \u0628\u0627\u0644\u0635\u0646\u0641 \u0648\u0644\u0627 \u064a\u0645\u0643\u0646 \u0627\u0644\u0648\u0635\u0648\u0644 \u0625\u0644\u064a\u0647 \u0645\u0646 \u062e\u0627\u0631\u062c \u0627\u0644\u0643\u0627\u0626\u0646 \u0627\u0644\u0645\u064f\u0646\u0634\u064e\u0623 \u0645\u0646 \u0647\u0630\u0627 \u0627\u0644\u0635\u0646\u0641\u060c \u0648\u0628\u0627\u0644\u062a\u0627\u0644\u064a \u0644\u0627 \u064a\u0645\u0643\u0646 \u0644\u0623\u062d\u062f \u0623\u0646 \u064a\u064f\u0639\u062f\u0651\u0644 \u0639\u0644\u064a\u0647 \u0625\u0644\u0651\u0627 \u0627\u0644\u062a\u0648\u0627\u0628\u0639 \u0627\u0644\u0645\u0648\u062c\u0648\u062f\u0629 \u0636\u0645\u0646 \u0646\u0641\u0633 \u0627\u0644\u0635\u0646\u0641 \u062d\u0635\u0631\u064b\u0627. \u0627\u0644\u0623\u0645\u0631 \u0627\u0644\u0622\u062e\u0631 \u0623\u0646\u0651\u0646\u0627 \u0642\u062f \u062c\u0639\u0644\u0646\u0627 \u0623\u0633\u0645\u0627\u0621 \u0627\u0644\u062d\u0642\u0648\u0644 \u062a\u0628\u062f\u0623 \u0628\u062d\u0631\u0641 \u0637\u0628\u0627\u0639\u064a \u0635\u063a\u064a\u0631 \u0648\u0630\u0644\u0643 \u0644\u062a\u0645\u064a\u064a\u0632\u0647\u0627 \u0639\u0646 \u0627\u0644\u062e\u0635\u0627\u0626\u0635 \u0627\u0644\u062a\u064a \u0633\u062a\u0623\u062a\u064a \u0628\u0639\u062f\u0647\u0627 \u0648\u0627\u0644\u062a\u064a \u062a\u062d\u0645\u0644 \u0646\u0641\u0633 \u0627\u0644\u0627\u0633\u0645 \u0648\u0644\u0643\u0646 \u0628\u062d\u0631\u0641 \u0637\u0628\u0627\u0639\u064a \u0643\u0628\u064a\u0631. <\/p>\n<p> \t\u064a\u0628\u062f\u0623 \u0627\u0644\u062a\u0635\u0631\u064a\u062d \u0639\u0646 \u0627\u0644\u062e\u0627\u0635\u064a\u0651\u0629 FirstName \u0641\u064a \u0627\u0644\u0633\u0637\u0631 12 \u0648\u064a\u0645\u062a\u062f\u0651 \u062d\u062a\u0649 \u0627\u0644\u0633\u0637\u0631 22. \u0644\u0644\u062e\u0635\u0627\u0626\u0635 \u0641\u064a \u0633\u064a \u0634\u0627\u0631\u0628 \u0641\u0648\u0627\u0626\u062f \u0639\u0638\u064a\u0645\u0629 \u0633\u0646\u062e\u062a\u0628\u0631\u0647\u0627 \u0628\u0627\u0644\u062a\u062f\u0631\u064a\u062c \u0641\u064a \u0647\u0630\u0627 \u0627\u0644\u062f\u0631\u0633 \u0648\u0641\u064a \u0627\u0644\u062f\u0631\u0648\u0633 \u0627\u0644\u0644\u0651\u0627\u062d\u0642\u0629. \u0644\u0627\u062d\u0638 \u0648\u062c\u0648\u062f \u0627\u0644\u0646\u0648\u0639 string \u0642\u0628\u0644 \u0627\u0633\u0645 \u0627\u0644\u062e\u0627\u0635\u064a\u0651\u0629 \u0641\u064a \u0627\u0644\u0633\u0637\u0631 12\u060c \u064a\u064f\u0634\u064a\u0631 \u0630\u0644\u0643 \u0625\u0644\u0649 \u0623\u0646\u0651 \u0647\u0630\u0647 \u0627\u0644\u062e\u0627\u0635\u064a\u0651\u0629 \u062a\u0642\u0628\u0644 \u0648\u062a\u0639\u0637\u064a \u0642\u064a\u0645\u064b\u0627 \u0646\u0635\u064a\u0651\u0629 \u0641\u062d\u0633\u0628. \u0641\u064a \u0627\u0644\u062d\u0642\u064a\u0642\u0629 \u064a\u0645\u0643\u0646 \u0627\u0633\u062a\u0628\u062f\u0627\u0644 string \u0628\u0623\u064a\u0651 \u0646\u0648\u0639 \u0646\u062d\u062a\u0627\u062c\u0647. \u0645\u0646 \u0627\u0644\u0648\u0627\u0636\u062d \u0623\u0646\u0651 \u0627\u0644\u062a\u0635\u0631\u064a\u062d \u0639\u0646 \u0627\u0644\u062e\u0627\u0635\u064a\u0651\u0629 FirstName \u064a\u062a\u0623\u0644\u0651\u0641 \u0645\u0646 \u0642\u0633\u0645\u064a\u0646: \u0642\u0633\u0645 \u0627\u0644\u0642\u0631\u0627\u0621\u0629 get (\u0628\u064a\u0646 \u0627\u0644\u0633\u0637\u0631\u064a\u0646 14 \u0648 17) \u0648\u0642\u0633\u0645 \u0627\u0644\u0625\u0633\u0646\u0627\u062f set (\u0628\u064a\u0646 \u0627\u0644\u0633\u0637\u0631\u064a\u0646 18 \u0648 21). \u0641\u064a \u0627\u0644\u0648\u0627\u0642\u0639 \u0644\u0627 \u062a\u062a\u0639\u062f\u0651\u0649 \u0627\u0644\u062e\u0627\u0635\u064a\u0651\u0629 \u0643\u0648\u0646\u0647\u0627 \u0648\u0633\u064a\u0644\u0629 \u0644\u0644\u0648\u0635\u0648\u0644 \u0625\u0644\u0649 \u0627\u0644\u062d\u0642\u0648\u0644 \u0627\u0644\u062e\u0627\u0635\u0651\u0629 private fields \u0627\u0644\u0645\u0648\u062c\u0648\u062f\u0629 \u0636\u0645\u0646 \u0627\u0644\u0643\u0627\u0626\u0646 \u0633\u0648\u0627\u0621\u064b \u0628\u0627\u0644\u0642\u0631\u0627\u0621\u0629 \u0623\u0648 \u0627\u0644\u0625\u0633\u0646\u0627\u062f\u060c \u0648\u0644\u0643\u0646 \u0645\u0639 \u0625\u0645\u0643\u0627\u0646\u064a\u0651\u0629 \u0645\u0639\u0627\u0644\u062c\u0629 \u0627\u0644\u0642\u064a\u0645 \u0633\u0648\u0627\u0621\u064b \u0642\u0628\u0644 \u0625\u0633\u0646\u0627\u062f\u0647\u0627 \u0625\u0644\u0649 \u0647\u0630\u0647 \u0627\u0644\u062d\u0642\u0648\u0644 \u0623\u0648 \u0628\u0639\u062f \u0627\u0644\u0642\u0631\u0627\u0621\u0629 \u0645\u0646\u0647\u0627. \u0639\u0646\u062f\u0645\u0627 \u0646\u062d\u0627\u0648\u0644 \u0625\u0633\u0646\u0627\u062f \u0642\u064a\u0645\u0629 \u0625\u0644\u0649 \u0627\u0644\u062e\u0627\u0635\u064a\u0651\u0629 FirstName \u0633\u062a\u064f\u0646\u0641\u0651\u0630 \u0627\u0644\u0639\u0628\u0627\u0631\u0627\u062a \u0627\u0644\u0628\u0631\u0645\u062c\u064a\u0651\u0629 \u0627\u0644\u0645\u0648\u062c\u0648\u062f\u0629 \u0641\u064a \u0642\u0633\u0645 set\u060c \u0648\u0647\u064a \u0639\u0628\u0627\u0631\u0629 \u0628\u0631\u0645\u062c\u064a\u0651\u0629 \u0648\u0627\u062d\u062f\u0629 \u0641\u0642\u0637 \u0641\u064a \u0645\u062b\u0627\u0644\u0646\u0627 \u0647\u0630\u0627: <\/p>\n<pre> this.firstName = value;<\/pre>\n<p> \t\u0627\u0644\u0643\u0644\u0645\u0629 value \u0647\u064a \u0643\u0644\u0645\u0629 \u0645\u062d\u062c\u0648\u0632\u0629 \u062a\u062d\u062a\u0648\u064a \u0639\u0644\u0649 \u0627\u0644\u0642\u064a\u0645\u0629 \u0627\u0644\u0645\u064f\u0633\u0646\u062f\u0629 \u0625\u0644\u0649 \u0627\u0644\u062e\u0627\u0635\u064a\u0651\u0629 FirstName. \u0627\u0644\u0639\u0628\u0627\u0631\u0629 \u0627\u0644\u0633\u0627\u0628\u0642\u0629 \u0648\u0627\u0636\u062d\u0629 \u0644\u0644\u063a\u0627\u064a\u0629 \u0641\u0647\u064a \u062a\u0639\u0645\u0644 \u0639\u0644\u0649 \u0625\u0633\u0646\u0627\u062f \u0627\u0644\u0642\u064a\u0645\u0629 \u0627\u0644\u0645\u062e\u0632\u0651\u0646\u0629 \u0636\u0645\u0646 value \u0625\u0644\u0649 \u0627\u0644\u062d\u0642\u0644 firstName. \u0644\u0627\u062d\u0638 \u0643\u064a\u0641 \u064a\u0645\u0643\u0646\u0646\u0627 \u0627\u0644\u0648\u0635\u0648\u0644 \u0625\u0644\u0649 \u0647\u0630\u0627 \u0627\u0644\u062d\u0642\u0644 \u0645\u0646 \u0627\u0644\u0643\u0644\u0645\u0629 this\u060c \u0643\u0645\u0627 \u0648\u064a\u0645\u0643\u0646\u0646\u0627 \u0625\u063a\u0641\u0627\u0644\u0647\u0627. \u0646\u0633\u062a\u0637\u064a\u0639 \u0627\u0644\u0648\u0635\u0648\u0644 \u0625\u0644\u0649 \u0627\u0644\u062d\u0642\u0644 firstName \u0631\u063a\u0645 \u0623\u0646\u0651\u0647 \u0630\u0648 \u0645\u062d\u062f\u0651\u062f \u0648\u0635\u0648\u0644 private \u0644\u0623\u0646\u0651\u0646\u0627 \u0646\u0635\u0644 \u0625\u0644\u064a\u0647 \u0645\u0646 \u062a\u0627\u0628\u0639 \u064a\u0642\u0639 \u0641\u064a \u0646\u0641\u0633 \u0627\u0644\u0635\u0646\u0641. <\/p>\n<p> \t\u0623\u0645\u0651\u0627 \u0639\u0646\u062f\u0645\u0627 \u0646\u062d\u0627\u0648\u0644 \u0642\u0631\u0627\u0621\u0629 \u0627\u0644\u062e\u0627\u0635\u064a\u0651\u0629 FirstName \u0641\u0633\u064a\u062a\u0645\u0651 \u062a\u0646\u0641\u064a\u0630 \u0627\u0644\u0639\u0628\u0627\u0631\u0627\u062a \u0627\u0644\u0628\u0631\u0645\u062c\u064a\u0651\u0629 \u0627\u0644\u0645\u0648\u062c\u0648\u062f\u0629 \u0636\u0645\u0646 \u0627\u0644\u0642\u0633\u0645 get. \u0641\u064a \u0647\u0630\u0627 \u0627\u0644\u0645\u062b\u0627\u0644 \u064a\u062d\u062a\u0648\u064a \u0627\u0644\u0642\u0633\u0645 get \u0639\u0644\u0649 \u0639\u0628\u0627\u0631\u0629 \u0628\u0631\u0645\u062c\u064a\u0651\u0629 \u0648\u0627\u062d\u062f\u0629 \u0648\u0647\u064a: <\/p>\n<pre> return this.firstName;<\/pre>\n<p> \t\u062d\u064a\u062b \u062a\u0639\u0645\u0644 \u0639\u0644\u0649 \u0625\u0631\u062c\u0627\u0639 \u0627\u0644\u0642\u064a\u0645\u0629 \u0627\u0644\u0645\u062e\u0632\u0651\u0646\u0629 \u0636\u0645\u0646 \u0627\u0644\u062d\u0642\u0644 firstName \u0625\u0644\u0649 \u0627\u0644\u0634\u064a\u0641\u0631\u0629 \u0627\u0644\u062a\u064a \u0637\u0644\u0628\u062a \u0642\u0631\u0627\u0621\u0629 \u0627\u0644\u062e\u0627\u0635\u064a\u0651\u0629 FirstName. \u064a\u0637\u0628\u0651\u0642 \u0646\u0641\u0633 \u0627\u0644\u0623\u0645\u0631 \u062a\u0645\u0627\u0645\u064b\u0627 \u0639\u0644\u0649 \u0627\u0644\u062e\u0627\u0635\u064a\u0651\u062a\u064a\u0646 LastName \u0648 Salary. <\/p>\n<h2> \t\u0627\u0644\u062e\u0635\u0627\u0626\u0635 \u0627\u0644\u0645\u0637\u0628\u0642\u0629 \u062a\u0644\u0642\u0627\u0626\u064a\u0627 <\/h2>\n<p> \t\u064a\u0628\u062f\u0648 \u0627\u0644\u0628\u0631\u0646\u0627\u0645\u062c \u0627\u0644\u0633\u0627\u0628\u0642 \u0637\u0648\u064a\u0644\u064b\u0627 \u0628\u0644\u0627 \u0645\u0628\u0631\u0651\u0631\u060c \u0641\u0646\u062d\u0646 \u0644\u0645 \u0646\u0642\u0645 \u0628\u0623\u064a\u0651 \u0639\u0645\u0644 \u0636\u0645\u0646 \u0627\u0644\u062e\u0635\u0627\u0626\u0635 \u0633\u0648\u0649 \u0627\u0644\u0625\u0633\u0646\u0627\u062f \u0623\u0648 \u0627\u0644\u0642\u0631\u0627\u0621\u0629. \u0625\u0630\u0627 \u0643\u0627\u0646 \u0627\u0644\u0623\u0645\u0631 \u0643\u0630\u0644\u0643 \u0641\u064a \u0628\u0631\u0627\u0645\u062c\u0643 \u0627\u0644\u062d\u0642\u064a\u0642\u064a\u0651\u0629 \u0641\u064a\u0645\u0643\u0646\u0643 \u0627\u0644\u0627\u0633\u062a\u063a\u0646\u0627\u0621 \u0639\u0646 \u0647\u0630\u0627 \u0627\u0644\u0634\u0643\u0644 \u0645\u0646 \u0627\u0644\u062e\u0635\u0627\u0626\u0635 \u0648\u0627\u0644\u0644\u062c\u0648\u0621 \u0625\u0644\u0649 \u0634\u0643\u0644 \u0623\u0643\u062b\u0631 \u062d\u062f\u0627\u062b\u0629\u064b \u0648\u0639\u0635\u0631\u064a\u0651\u0629\u060c \u0648\u0627\u0644\u0630\u064a \u064a\u062a\u0645\u062b\u0651\u0644 \u0628\u0627\u0644\u062e\u0635\u0627\u0626\u0635 \u0627\u0644\u0645\u0637\u0628\u0651\u0642\u0629 \u062a\u0644\u0642\u0627\u0626\u064a\u0651\u064b\u0627 auto implemented properties. \u0627\u0646\u0638\u0631 \u0627\u0644\u0634\u0643\u0644 \u0627\u0644\u0639\u0627\u0645 \u0644\u0647\u0627 \u0641\u064a\u0645\u0627 \u064a\u062a\u0639\u0644\u0651\u0642 \u0628\u0627\u0644\u062e\u0627\u0635\u064a\u0651\u0629 FirstName: <\/p>\n<pre> public string FirstName {   get;   set; }<\/pre>\n<p> \t\u0644\u0645 \u062a\u0639\u062f \u0627\u0644\u0639\u0628\u0627\u0631\u0627\u062a \u0627\u0644\u0628\u0631\u0645\u062c\u064a\u0651\u0629 \u0641\u064a \u0642\u0633\u0645\u064a\u0651 get \u0648 set \u0645\u0648\u062c\u0648\u062f\u0629. \u064a\u0646\u062d\u0635\u0631 \u062f\u0648\u0631 \u0647\u0630\u0647 \u0627\u0644\u062e\u0627\u0635\u064a\u0651\u0629 \u0641\u064a \u0634\u0643\u0644\u0647\u0627 \u0627\u0644\u062d\u0627\u0644\u064a \u0641\u064a \u062a\u062e\u0632\u064a\u0646 \u0627\u0644\u0642\u064a\u0645 \u0636\u0645\u0646 \u0627\u0644\u062e\u0627\u0635\u064a\u0651\u0629 FirstName \u0648\u0627\u0644\u0642\u0631\u0627\u0621\u0629 \u0645\u0646\u0647\u0627 \u0641\u0642\u0637. \u0648\u0644\u0643\u0646 \u064a\u0623\u062a\u064a \u0627\u0644\u0633\u0624\u0627\u0644 \u0647\u0646\u0627\u060c \u0623\u064a\u0646 \u0633\u062a\u062e\u0632\u0651\u0646 \u0627\u0644\u062e\u0627\u0635\u064a\u0651\u0629 FirstName \u0642\u064a\u0645\u0647\u0627\u060c \u0641\u0623\u0646\u0627 \u0644\u0627 \u0623\u0631\u0649 \u062d\u0642\u0644\u064b\u0627 \u0644\u0644\u062a\u062e\u0632\u064a\u0646! <\/p>\n<p> \t\u064a\u0639\u0645\u0644 \u0627\u0644\u0645\u062a\u0631\u062c\u0645 \u0641\u064a \u0647\u0630\u0647 \u0627\u0644\u062d\u0627\u0644\u0629 \u0639\u0644\u0649 \u0625\u0646\u0634\u0627\u0621 \u062d\u0642\u0644 \u062e\u0627\u0635 \u063a\u064a\u0631 \u0645\u064f\u0634\u0627\u0647\u062f \u0641\u064a \u0634\u064a\u0641\u0631\u0629 MSIL \u0648\u0638\u064a\u0641\u062a\u0647 \u0627\u0644\u0627\u062d\u062a\u0641\u0627\u0638 \u0628\u0642\u064a\u0645\u0629 \u0627\u0644\u062e\u0627\u0635\u064a\u0651\u0629 FirstName. \u0648\u0647\u0646\u0627 \u0642\u062f \u064a\u062c\u0648\u0644 \u0628\u062e\u0627\u0637\u0631\u0643 \u0633\u0624\u0627\u0644 \u0622\u062e\u0631: \u0644\u0645\u0627\u0630\u0627 \u0643\u0644\u0651 \u0647\u0630\u0627 \u0627\u0644\u062a\u0639\u0642\u064a\u062f\u060c \u0644\u0645\u0627\u0630\u0627 \u0644\u0627 \u0646\u0633\u062a\u062e\u062f\u0645 \u0627\u0644\u062d\u0642\u0648\u0644 \u0643\u0645\u0627 \u0643\u0646\u0651\u0627 \u0646\u0641\u0639\u0644 \u0641\u064a \u0627\u0644\u062f\u0631\u0633 \u0627\u0644\u0633\u0627\u0628\u0642 \u0648\u062d\u0633\u0628\u061f <\/p>\n<p> \t\u0627\u0644\u0625\u062c\u0627\u0628\u0629 \u0628\u0633\u064a\u0637\u0629 \u0639\u0644\u0649 \u0647\u0630\u0627 \u0627\u0644\u062a\u0633\u0627\u0624\u0644 \u0627\u0644\u0645\u0634\u0631\u0648\u0639. \u0641\u0646\u062d\u0646 \u0646\u0633\u062a\u062e\u062f\u0645 \u0627\u0644\u062e\u0635\u0627\u0626\u0635 \u0628\u0647\u0630\u0627 \u0627\u0644\u0634\u0643\u0644 \u0644\u063a\u0627\u064a\u0627\u062a \u062a\u0635\u0645\u064a\u0645\u064a\u0651\u0629 \u0641\u062d\u0633\u0628. \u0641\u0643\u0644\u0651\u0645\u0627 \u0643\u0646\u062a \u0628\u062d\u0627\u062c\u0629 \u0644\u0623\u0646 \u062a\u064f\u0636\u064a\u0641 \u062e\u0627\u0635\u064a\u0651\u0629 \u0644\u0623\u062d\u062f \u0627\u0644\u0623\u0635\u0646\u0627\u0641 \u064a\u0645\u0643\u0646 \u0627\u0644\u0648\u0635\u0648\u0644 \u0625\u0644\u064a\u0647\u0627 \u0645\u0646 \u062e\u0627\u0631\u062c\u0647 \u0641\u0627\u0641\u0639\u0644 \u0630\u0644\u0643 \u0639\u0646 \u0637\u0631\u064a\u0642 \u0627\u0644\u062e\u0635\u0627\u0626\u0635 (\u0648\u0644\u064a\u0633 \u0627\u0644\u062d\u0642\u0648\u0644) \u0648\u0644\u0646 \u062a\u0646\u062f\u0645\u060c \u0648\u0625\u0646 \u0628\u062f\u0627 \u0630\u0644\u0643 \u064a\u062a\u0637\u0644\u0651\u0628 \u0627\u0644\u0645\u0632\u064a\u062f \u0645\u0646 \u0627\u0644\u0639\u0645\u0644. <\/p>\n<p> \t\u0633\u0646\u0637\u0628\u0651\u0642 \u0647\u0630\u0647 \u0627\u0644\u062e\u0635\u0627\u0626\u0635 \u0627\u0644\u0641\u0631\u064a\u062f\u0629 \u0639\u0644\u0649 \u0628\u0631\u0646\u0627\u0645\u062c\u0646\u0627 \u0627\u0644\u0645\u0639\u062f\u0651\u0644 Lesson07_02 \u0628\u062d\u064a\u062b \u062a\u0633\u062a\u063a\u0646\u064a \u062a\u0645\u0627\u0645\u064b\u0627 \u0639\u0646 \u0627\u0644\u062d\u0642\u0648\u0644 firstName \u0648 lastName \u0648 salary. <\/p>\n<pre> 1   using System; 2 3   namespace Lesson07_02 4   { 5 6       class Employee 7       { 8           public string FirstName { get; set; } 9           public string LastName { get; set; } 10          public double Salary { get; set; } 11 12          public string DisplayInfo() 13          { 14              string result = string.Format(&quot;{0} {1} - Salary: {2:N0}&quot;, 15                  this.FirstName, this.LastName, this.Salary); 16 17              return result; 18          } 19 20          public Employee(string firstName, string lastName, double salary) 21          { 22              this.FirstName = firstName; 23              this.LastName = lastName; 24              this.Salary = salary; 25          } 26 27          public Employee() 28          { 29 30          } 31      } 32 33 34      class Program 35      { 36          static void Main(string[] args) 37          { 38              Employee employee1, employee2; 39 40              employee1 = new Employee(&quot;Mohammad&quot;, &quot;Mansoor&quot;, 1000); 41              employee2 = new Employee(&quot;Saleh&quot;, &quot;Mahmoud&quot;, 2500); 42 43              Console.WriteLine(&quot;First Employee: {0}&quot;, employee1.DisplayInfo()); 44              Console.WriteLine(&quot;Second Employee: {0}&quot;, employee2.DisplayInfo()); 45          } 46      } 47  }<\/pre>\n<p> \t\u0623\u0635\u0628\u062d \u0647\u0630\u0627 \u0627\u0644\u0628\u0631\u0646\u0627\u0645\u062c \u0627\u0644\u0622\u0646 \u064a\u064f\u0634\u0628\u0647 \u0627\u0644\u0628\u0631\u0646\u0627\u0645\u062c Lesson06_02 \u0645\u0646 \u0627\u0644\u062f\u0631\u0633 \u0627\u0644\u0633\u0627\u0628\u0642 \u0625\u0644\u0649 \u062d\u062f\u0651 \u0643\u0628\u064a\u0631\u060c \u0628\u0627\u0633\u062a\u062b\u0646\u0627\u0621 \u0623\u0646\u0651\u0646\u0627 \u0646\u0633\u062a\u062e\u062f\u0645 \u0647\u0646\u0627 \u0627\u0644\u062e\u0635\u0627\u0626\u0635 \u0628\u062f\u0644\u064b\u0627 \u0645\u0646 \u0627\u0644\u062d\u0642\u0648\u0644. \u0644\u0627\u062d\u0638 \u0641\u0642\u0637 \u0623\u0646\u0651\u0647 \u064a\u0645\u0643\u0646\u0646\u0627 \u0643\u062a\u0627\u0628\u0629 \u0627\u0644\u062a\u0635\u0631\u064a\u062d \u0639\u0646 \u0623\u064a\u0651 \u062e\u0627\u0635\u064a\u0651\u0629 \u0639\u0644\u0649 \u0646\u0641\u0633 \u0627\u0644\u0633\u0637\u0631 \u0645\u062b\u0644 \u0627\u0644\u0623\u0633\u0637\u0631 8 \u0648 9 \u0648 10. <\/p>\n<h2> \t\u0627\u0644\u062e\u0635\u0627\u0626\u0635 \u0630\u0627\u062a \u0625\u0645\u0643\u0627\u0646\u064a\u0629 \u0627\u0644\u0642\u0631\u0627\u0621\u0629 \u0641\u0642\u0637 <\/h2>\n<p> \t\u0647\u0644 \u062a\u0630\u0643\u064f\u0631 \u0627\u0644\u062a\u0645\u0631\u064a\u0646 \u0627\u0644\u062f\u0627\u0639\u0645 \u0627\u0644\u0623\u0648\u0651\u0644 \u0645\u0646 \u0627\u0644\u062f\u0631\u0633 \u0627\u0644\u0633\u0627\u0628\u0642\u061f <\/p>\n<p> \t\u0643\u0627\u0646 \u064a\u0637\u0644\u0628 \u0630\u0644\u0643 \u0627\u0644\u062a\u0645\u0631\u064a\u0646 \u0625\u0636\u0627\u0641\u0629 \u062a\u0627\u0628\u0639 \u062c\u062f\u064a\u062f \u0627\u0633\u0645\u0647 GetSalaryAfterTax \u0644\u0644\u062d\u0635\u0648\u0644 \u0639\u0644\u0649 \u0642\u064a\u0645\u0629 \u0627\u0644\u0631\u0627\u062a\u0628 \u0628\u0639\u062f \u062e\u0635\u0645 \u0627\u0644\u0636\u0631\u064a\u0628\u0629. \u0648\u0627\u062a\u0641\u0642\u0646\u0627 \u0648\u0642\u062a\u0647\u0627 \u0623\u0646 \u062a\u0643\u0648\u0646 \u0647\u0630\u0647 \u0627\u0644\u0636\u0631\u064a\u0628\u0629 2%. \u0633\u0646\u0636\u064a\u0641 \u062e\u0627\u0635\u064a\u0651\u0629\u064b \u0644\u062a\u0642\u0648\u0645 \u0628\u0647\u0630\u0647 \u0627\u0644\u0645\u0647\u0645\u0651\u0629 \u0628\u062f\u0644\u064b\u0627 \u0645\u0646 \u0647\u0630\u0627 \u0627\u0644\u062a\u0627\u0628\u0639\u060c \u0648\u0644\u0643\u0646\u0651\u0646\u0627 \u0633\u0646\u062c\u0639\u0644\u0647\u0627 \u0644\u0644\u0642\u0631\u0627\u0621\u0629 \u0641\u0642\u0637 read only. \u0623\u064a \u0644\u0627 \u064a\u0645\u0643\u0646 \u0625\u0633\u0646\u0627\u062f \u0623\u064a \u0642\u064a\u0645 \u0644\u0647\u0627. <\/p>\n<p> \t\u0633\u062a\u0643\u0648\u0646 \u0627\u0644\u062e\u0627\u0635\u064a\u0651\u0629 SalaryAfterTax \u0627\u0644\u062c\u062f\u064a\u062f\u0629 \u0639\u0644\u0649 \u0627\u0644\u0634\u0643\u0644 \u0627\u0644\u062a\u0627\u0644\u064a: <\/p>\n<pre> public double SalaryAfterTax {   get   {     return 0.98 * this.Salary;   } }<\/pre>\n<p> \t\u0645\u0646 \u0627\u0644\u0648\u0627\u0636\u062d \u0623\u0646\u0651\u0647 \u0642\u062f \u0623\u0632\u0644\u0646\u0627 \u0627\u0644\u0642\u0633\u0645 set \u0627\u0644\u0645\u0633\u0624\u0648\u0644 \u0639\u0646 \u0627\u0644\u0625\u0633\u0646\u0627\u062f \u0645\u0646 \u062a\u0635\u0631\u064a\u062d \u0627\u0644\u062e\u0627\u0635\u064a\u0651\u0629 SalaryAfterTax \u0648\u0628\u0630\u0644\u0643 \u062a\u062a\u062d\u0648\u0651\u0644 \u0644\u0644\u0642\u0631\u0627\u0621\u0629 \u0641\u0642\u0637. \u064a\u062d\u062a\u0648\u064a \u0627\u0644\u0642\u0633\u0645 get \u0639\u0644\u0649 \u0639\u0645\u0644\u064a\u0651\u0629 \u062d\u0633\u0627\u0628\u064a\u0651\u0629 \u0628\u0633\u064a\u0637\u0629 \u062a\u0637\u0628\u0651\u0642 \u0639\u0645\u0644\u064a\u0629 \u062d\u0633\u0645 \u0627\u0644\u0636\u0631\u064a\u0628\u0629 \u0639\u0644\u0649 \u0627\u0644\u0631\u0627\u062a\u0628 Salary. <\/p>\n<p> \t\u0633\u0646\u062c\u0631\u064a \u062a\u0639\u062f\u064a\u0644\u064b\u0627 \u0637\u0641\u064a\u0641\u064b\u0627 \u0639\u0644\u0649 \u0627\u0644\u062a\u0627\u0628\u0639 DisplayInfo \u0644\u0643\u064a \u064a\u064f\u0631\u0641\u0642 \u0642\u064a\u0645\u0629 \u0627\u0644\u0631\u0627\u062a\u0628 \u0628\u0639\u062f \u062d\u0633\u0645 \u0627\u0644\u0636\u0631\u064a\u0628\u0629 \u0636\u0645\u0646 \u0627\u0644\u0646\u0635\u0651 \u0627\u0644\u0645\u0646\u0633\u0651\u0642 \u0627\u0644\u0630\u064a \u064a\u0631\u062c\u0639\u0647. \u0633\u0646\u062d\u0635\u0644 \u0641\u064a \u0627\u0644\u0646\u062a\u064a\u062c\u0629 \u0639\u0644\u0649 \u0627\u0644\u0628\u0631\u0646\u0627\u0645\u062c Lesson07_03 \u0627\u0644\u0645\u0639\u062f\u0651\u0644: <\/p>\n<pre> 1   using System; 2 3   namespace Lesson07_03 4   { 5 6       class Employee 7       { 8           public string FirstName { get; set; } 9           public string LastName { get; set; } 10          public double Salary { get; set; } 11          public double SalaryAfterTax 12          { 13              get 14              { 15                  return 0.98 * this.Salary; 16              } 17          } 18          19          public string DisplayInfo() 20          { 21              string result = string.Format(&quot;{0} {1} n Salary: {2:N0} n Salary after tax: {3:N0}&quot;, 22                  this.FirstName, this.LastName, this.Salary, this.SalaryAfterTax); 23 24              return result; 25          } 26 27          public Employee(string firstName, string lastName, double salary) 28          { 29              this.FirstName = firstName; 30              this.LastName = lastName; 31              this.Salary = salary; 32          } 33 34          public Employee() 35          { 36 37          } 38      } 39 40 41      class Program 42      { 43          static void Main(string[] args) 44          { 45              Employee employee1, employee2; 46 47              employee1 = new Employee(&quot;Mohammad&quot;, &quot;Mansoor&quot;, 1000); 48              employee2 = new Employee(&quot;Saleh&quot;, &quot;Mahmoud&quot;, 2500); 49 50              Console.WriteLine(&quot;First Employee: {0}&quot;, employee1.DisplayInfo()); 51              Console.WriteLine(&quot;Second Employee: {0}&quot;, employee2.DisplayInfo()); 52          } 53      } 54  }<\/pre>\n<p> \t\u0623\u0636\u0641\u062a \u0627\u0644\u062e\u0627\u0635\u064a\u0651\u0629 SalaryAfterTax (\u0627\u0644\u0623\u0633\u0637\u0631 \u0645\u0646 11 \u062d\u062a\u0649 17). \u0648\u0623\u062c\u0631\u064a\u062a \u062a\u0639\u062f\u064a\u0644\u064b\u0627 \u0637\u0641\u064a\u0641\u064b\u0627 \u0636\u0645\u0646 \u0627\u0644\u062a\u0627\u0628\u0639 DisplayInfo \u0641\u064a \u0627\u0644\u0633\u0637\u0631 21 \u062d\u064a\u062b \u0623\u0636\u0641\u062a \u0627\u0644\u0645\u062d\u0631\u0641 n \u0648\u0627\u0644\u0630\u064a \u064a\u064f\u0633\u062a\u062e\u062f\u0645 \u0636\u0645\u0646 \u0627\u0644\u0646\u0635 \u0644\u0644\u0625\u0634\u0627\u0631\u0629 \u0625\u0644\u0649 \u0648\u062c\u0648\u0628 \u0627\u0644\u0627\u0646\u062a\u0642\u0627\u0644 \u0625\u0644\u0649 \u0633\u0637\u0631 \u062c\u062f\u064a\u062f \u0644\u0623\u063a\u0631\u0627\u0636 \u062a\u0646\u0633\u064a\u0642\u064a\u0629 \u0641\u0642\u0637\u060c \u0643\u0645\u0627 \u0623\u0636\u0641\u062a \u0645\u0643\u0627\u0646\u064b\u0627 \u0641\u064a \u0627\u0644\u0646\u0635\u0651 \u0627\u0644\u062a\u0646\u0633\u064a\u0642\u064a\u0651 {3:N0} \u0644\u0625\u062f\u0631\u0627\u062c \u0642\u064a\u0645\u0629 \u0627\u0644\u0631\u0627\u062a\u0628 \u0628\u0639\u062f \u062e\u0635\u0645 \u0627\u0644\u0636\u0631\u064a\u0628\u0629 this.SalaryAfterTax\u060c \u0648\u0647\u0630\u0627 \u0643\u0644\u0651 \u0645\u0627 \u0641\u064a \u0627\u0644\u0623\u0645\u0631. <\/p>\n<p> \t\u0625\u0630\u0627 \u062d\u0627\u0648\u0644\u062a \u0641\u064a \u0647\u0630\u0627 \u0627\u0644\u0628\u0631\u0646\u0627\u0645\u062c \u0623\u0646 \u062a\u064f\u0633\u0646\u062f \u0623\u064a\u0651 \u0642\u064a\u0645\u0629 \u0625\u0644\u0649 \u0627\u0644\u062e\u0627\u0635\u064a\u0651\u0629 SalaryAfterTax \u0633\u062a\u062d\u0635\u0644 \u0639\u0644\u0649 \u062e\u0637\u0623 \u064a\u0641\u064a\u062f \u0623\u0646\u0651\u0647\u0627 \u0644\u0644\u0642\u0631\u0627\u0621\u0629 \u0641\u0642\u0637 read only. <\/p>\n<h2> \t\u0627\u0644\u0623\u0639\u0636\u0627\u0621 \u0627\u0644\u0633\u0627\u0643\u0646\u0629 Static Members <\/h2>\n<p> \t \u0647\u064a \u0623\u0639\u0636\u0627\u0621 \u064a\u0645\u0643\u0646 \u0627\u0633\u062a\u062f\u0639\u0627\u0624\u0647\u0627 \u0645\u0628\u0627\u0634\u0631\u0629\u064b \u0645\u0646 \u0627\u0644\u0635\u0646\u0641 \u0627\u0644\u0630\u064a \u0635\u064f\u0631\u0651\u062d\u062a \u0636\u0645\u0646\u0647\u060c \u0648\u0644\u064a\u0633 \u0645\u0646 \u0643\u0627\u0626\u0646 \u0645\u064f\u0646\u0634\u064e\u0623 \u0645\u0646 \u0647\u0630\u0627 \u0627\u0644\u0635\u0646\u0641. \u064a\u0645\u0643\u0646 \u0623\u0646 \u0646\u062c\u0639\u0644 \u0623\u064a\u0651 \u0639\u0636\u0648 \u0633\u0627\u0643\u0646 \u0648\u0630\u0644\u0643 \u0628\u0648\u0633\u0645\u0647 \u0628\u0627\u0644\u0643\u0644\u0645\u0629 \u0627\u0644\u0645\u062d\u062c\u0648\u0632\u0629 static. \u064a\u0648\u0636\u0651\u062d \u0627\u0644\u0628\u0631\u0646\u0627\u0645\u062c Lesson07_04 \u0627\u0633\u062a\u062e\u062f\u0627\u0645 \u0627\u0644\u062a\u0648\u0627\u0628\u0639 \u0627\u0644\u0633\u0627\u0643\u0646\u0629. \u0644\u0627\u062d\u0638 \u0648\u062c\u0648\u062f \u0627\u0644\u0643\u0644\u0645\u0629 \u0627\u0644\u0645\u062d\u062c\u0648\u0632\u0629 static \u0628\u0639\u062f \u0645\u062d\u0651\u062f\u062f \u0627\u0644\u0648\u0635\u0648\u0644 public: <\/p>\n<pre> 1   using System; 2 3   namespace Lesson07_04 4   { 5       class Calculator 6       { 7           public static double Addition(double x, double y) 8           { 9               return x + y; 10          } 11 12          public static double Minus(double x, double y) 13          { 14              return x - y; 15          } 16 17          public static double Division(double x, double y) 18          { 19              if (y == 0) 20              { 21                  return double.NaN; 22              } 23              else 24              { 25                  return x \/ y; 26              } 27          } 28  29          public static double Multiplication(double x, double y) 30          { 31              return x * y; 32          } 33      } 34 35      class Program 36      { 37          static void Main(string[] args) 38          { 39              double x = 5; 40              double y = 9; 41 42              double addition = Calculator.Addition(x, y); 43              double minus = Calculator.Minus(x, y); 44              double multiplication = Calculator.Multiplication(x, y); 45              double division = Calculator.Division(x, y); 46 47              Console.WriteLine(&quot;{0} + {1} = {2}&quot;, x, y, addition); 48              Console.WriteLine(&quot;{0} - {1} = {2}&quot;, x, y, minus); 49              Console.WriteLine(&quot;{0} * {1} = {2}&quot;, x, y, multiplication); 50              Console.WriteLine(&quot;{0} \/ {1} = {2}&quot;, x, y, division); 51          } 52      } 53  }<\/pre>\n<p> \t\u0646\u0641\u0651\u0630 \u0627\u0644\u0628\u0631\u0646\u0627\u0645\u062c \u0627\u0644\u0633\u0627\u0628\u0642 \u0644\u062a\u062d\u0635\u0644 \u0639\u0644\u0649 \u0627\u0644\u062e\u0631\u062c \u0627\u0644\u062a\u0627\u0644\u064a: <\/p>\n<pre> 5 + 9 = 14 5 - 9 = -4 5 * 9 = 45 5 \/ 9 = 0.555555555555556<\/pre>\n<p> \t\u0623\u0646\u0634\u0623\u0646\u0627 \u0627\u0644\u0635\u0646\u0641 Calculator \u0627\u0644\u0630\u064a \u064a\u062d\u062a\u0648\u064a \u0639\u0644\u0649 \u0627\u0644\u062a\u0648\u0627\u0628\u0639 \u0627\u0644\u0633\u0627\u0643\u0646\u0629 Addition \u0648 Minus \u0648 Multiplication \u0648 Division. \u0625\u0630\u0627 \u0627\u0646\u062a\u0642\u0644\u0646\u0627 \u0625\u0644\u0649 \u0627\u0644\u062a\u0627\u0628\u0639 Main (\u0627\u0644\u0630\u064a \u0647\u0648 \u0628\u0627\u0644\u0645\u0646\u0627\u0633\u0628\u0629 \u062a\u0627\u0628\u0639 \u0633\u0627\u0643\u0646 \u0628\u0633\u0628\u0628 \u0648\u062c\u0648\u062f 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\u0635\u0641\u0631 \u0644\u0646 \u062a\u0639\u0637\u064a\u0646\u0627 \u0639\u062f\u062f. \u0625\u0630\u0627 \u0627\u0633\u062a\u0628\u062f\u0644\u062a \u0642\u064a\u0645\u0629 y \u0641\u064a \u0627\u0644\u0633\u0637\u0631 40 \u0645\u0646 \u0627\u0644\u0628\u0631\u0646\u0627\u0645\u062c \u0627\u0644\u0633\u0627\u0628\u0642 \u0628\u0627\u0644\u0642\u064a\u0645\u0629 0 \u0633\u0646\u062d\u0635\u0644 \u0639\u0644\u0649 \u0627\u0644\u062e\u0631\u062c \u0627\u0644\u062a\u0627\u0644\u064a: <\/p>\n<pre> 5 + 0 = 5 5 - 0 = 5 5 * 0 = 0 5 \/ 0 = NaN<\/pre>\n<p> \t\u0644\u0627\u062d\u0638 \u0627\u0644\u0633\u0637\u0631 \u0627\u0644\u0623\u062e\u064a\u0631 \u0645\u0646 \u0627\u0644\u0628\u0631\u0646\u0627\u0645\u062c \u0643\u064a\u0641 \u064a\u0628\u062f\u0648 \u0645\u0646\u0637\u0642\u064a\u0651\u064b\u0627 \u062a\u0645\u0627\u0645\u064b\u0627. <\/p>\n<p> \t\u064a\u0645\u0643\u0646\u0646\u0627 \u062a\u0639\u0645\u064a\u0645 \u0646\u0641\u0633 \u0627\u0644\u0645\u0641\u0647\u0648\u0645 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\u0623\u064a\u0636\u064b\u0627 \u0639\u0646 \u0627\u0644\u062e\u0635\u0627\u0626\u0635 Properties \u0643\u0646\u0648\u0639 \u062c\u062f\u064a\u062f \u0645\u0646 \u0623\u0639\u0636\u0627\u0621 \u0627\u0644\u0635\u0646\u0641\u060c \u0648\u0627\u0644\u0641\u0631\u0642 \u0628\u064a\u0646\u0647\u0627 \u0648\u0628\u064a\u0646 \u062d\u0642\u0648\u0644 \u0627\u0644\u0628\u064a\u0627\u0646\u0627\u062a Data Fields. \u0648\u0633\u0646\u062e\u062a\u0645 \u0647\u0630\u0627 \u0627\u0644\u062f\u0631\u0633 \u0628\u0627\u0644\u062d\u062f\u064a\u062b \u0639\u0646 \u0627\u0644\u0623\u0639\u0636\u0627\u0621 \u0627\u0644\u0633\u0627\u0643\u0646\u0629 Static Members \u0641\u064a \u0627\u0644\u0635\u0646\u0641. <\/p>\n<p> \t\u0627\u0644\u062e\u0635\u0627\u0626\u0635 Properties \t\u0644\u0644\u062e\u0635\u0627\u0626\u0635 \u0648\u0644\u062d\u0642\u0648\u0644 \u0627\u0644\u0628\u064a\u0627\u0646\u0627\u062a \u0627\u0644\u0645\u0639\u0646\u0649 \u0627\u0644\u0645\u0646\u0637\u0642\u064a\u0651 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