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POClass Inside Structure
 

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    <p>Could some one please explain, What happens when a reference type is defined inside the value type. I write the following code:</p> <pre><code>namespace ClassInsideStruct { class ClassInsideStruct { static void Main(string[] args) { ValueType ObjVal = new ValueType(10); ObjVal.Display(); ValueType.ReferenceType ObjValRef = new ValueType.ReferenceType(10); ObjValRef.Display(); Test(ObjVal, ObjValRef); ObjVal.Display(); ObjValRef.Display(); Console.ReadKey(); } private static void Test(ValueType v, ValueType.ReferenceType r) { v.SValue = 50; r.RValue = 50; } } struct ValueType { int StructNum; ReferenceType ObjRef; public ValueType(int i) { StructNum = i; ObjRef = new ReferenceType(i); } public int SValue { get { return StructNum; } set { StructNum = value; ObjRef.RValue = value; } } public void Display() { Console.WriteLine("ValueType: " + StructNum); Console.Write("ReferenceType Inside ValueType Instance: "); ObjRef.Display(); } public class ReferenceType { int ClassNum; public ReferenceType(int i) { ClassNum = i; } public void Display() { Console.WriteLine("Reference Type: " + ClassNum); } public int RValue { get { return ClassNum; } set { ClassNum = value; } } } } } </code></pre> <p>Which outputs:</p> <pre> ValueType: 10 ReferenceType Inside ValueType Instance: Reference Type: 10 Reference Type: 10 ValueType: 10 ReferenceType Inside ValueType Instance: Reference Type: 50 Reference Type: 50 </pre> <p>I'm curious to know, after calling the method <code>Test(ObjVal, ObjValRef)</code>, how the values of <code>ReferenceType</code> is changed to 50 which resides inside the <code>ValueType</code> whose value is not changed?</p>
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    1. COThe location of the class to the structure is irrelevant. It's just a nested type (and in C# -- unlike say Java or Scala -- it is *not* dependent upon the enclosing type). It is the same semantics as if `ReferenceType` was *not* nested. Don't confuse types and variables with a given type and instantiated objects of a given type.
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