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  1. using System;
  2.  
  3. public class ObjClass
  4. {
  5. 	public int val;	
  6. }
  7.  
  8. public struct ObjStruct
  9. {
  10. 	public int val;	
  11. }
  12.  
  13. public class Container
  14. {
  15. 	public Container()
  16. 	{
  17. 		objClass=new ObjClass();
  18. 	}
  19.  
  20. 	public ObjClass objClass;	
  21. 	public ObjStruct objStruct;	
  22. }
  23.  
  24. public class Test
  25. {
  26. 	public static void Main()
  27. 	{
  28. 		Container containerA = new Container();
  29. 		containerA.objClass.val = 3;
  30. 		containerA.objStruct.val = 3;
  31.  
  32. 		ObjClass objClassB = new ObjClass();
  33. 		objClassB.val = 5;
  34.  
  35. 		ObjStruct objStructC;
  36. 		objStructC.val = 5;
  37.  
  38. 		Console.WriteLine("Step 1");
  39. 		Console.WriteLine("containerA.objClass.val = " + containerA.objClass.val);
  40. 		Console.WriteLine("containerA.objStruct.val = " + containerA.objStruct.val);
  41. 		Console.WriteLine("objClassB.val = " + objClassB.val);
  42. 		Console.WriteLine("objStructC.val = " + objStructC.val);
  43. 		Console.WriteLine("");
  44.  
  45. 		containerA.objClass = objClassB;
  46. 		containerA.objStruct = objStructC;
  47.  
  48. 		Console.WriteLine("Step 2");
  49. 		Console.WriteLine("containerA.objClass.val = " + containerA.objClass.val);
  50. 		Console.WriteLine("containerA.objStruct.val = " + containerA.objStruct.val);
  51. 		Console.WriteLine("objClassB.val = " + objClassB.val);
  52. 		Console.WriteLine("objStructC.val = " + objStructC.val);
  53. 		Console.WriteLine("");
  54.  
  55. 		objClassB.val = 7;
  56. 		objStructC.val = 7;
  57.  
  58. 		Console.WriteLine("Step 3");
  59. 		Console.WriteLine("containerA.objClass.val = " + containerA.objClass.val);
  60. 		Console.WriteLine("containerA.objStruct.val = " + containerA.objStruct.val);
  61. 		Console.WriteLine("objClassB.val = " + objClassB.val);
  62. 		Console.WriteLine("objStructC.val = " + objStructC.val);
  63. 		Console.WriteLine("");	
  64. 	}
  65. }
Success #stdin #stdout 0.03s 33904KB
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Standard input is empty
stdout
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Step 1
containerA.objClass.val = 3
containerA.objStruct.val = 3
objClassB.val = 5
objStructC.val = 5

Step 2
containerA.objClass.val = 5
containerA.objStruct.val = 5
objClassB.val = 5
objStructC.val = 5

Step 3
containerA.objClass.val = 7
containerA.objStruct.val = 5
objClassB.val = 7
objStructC.val = 7
https://ideone.com/5yqg2u
Illustrate that class instances are assigned by reference and struct instances are assigned by value
language:
C# (gmcs 5.20.1)
created:
10 years ago
visibility:
public

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