Example of Implemeting interface in structure and in class

Posted by in C# category on for Intermediate level | Points: 250 | Views : 7842 red flag

This article shows example of implementing interface into structure and how the interface types will be considered. weather value type or reference type even if it is implemented in structure value type..


Structure type is value type and class type & interface type is reference type. In this article explains how to verify that the interface is reference type even if it is used in structure( structure is value type)

Whenever we implement the interface in structure and assign the instance of that structure to an interface variable then it becomes reference type, however when we access the structure instance object directly then it is accessed as value type.

Below is an example of this scenario.

class Program


static void Main(string[] args)


SampleStruct strucInst1 = new SampleStruct();

strucInst1.StructureData = "Default Value";

//assign structure instance to another structure instance

SampleStruct strucInst2 = strucInst1;

//Modify the structure data through the structure instance

strucInst2.StructureData = "Modified Value";

Console.WriteLine("Structure strucInst1 Initial value:- '" + strucInst1.StructureData + "'");

Console.WriteLine("Structure strucInst2 Modified value:- '" + strucInst2.StructureData + "'");

//Assign structure instance to an interface variable.

IInterface interfaceInst1 = strucInst1;

interfaceInst1.InterfaceData = "Defualt interface value";

IInterface interfaceInst2 = interfaceInst1;

interfaceInst2.InterfaceData = "Modified Interface value";

Console.WriteLine("Structure interfaceInst1 Initial value:- '" + interfaceInst1.InterfaceData + "'");

Console.WriteLine("Structure interfaceInst2 Modified value:- '" + interfaceInst2.InterfaceData + "'");




interface IInterface


string InterfaceData { getset; }


struct SampleStruct : IInterface


public string StructureData { getset; }

string interfaceData;

public string InterfaceData




return interfaceData;




interfaceData = value;




The out put of the above code print outs the following


So this article explain that how to verify that the interface is reference type not value type even if it is used in structure.

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About the Author

Full Name: Dhirendra Patil
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Member Since: 3/23/2010 2:39:20 PM
Country: India


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