Variable Scope in C#

Variables can have one of the following levels of scope:

• Block

• Procedure

• Class

• Namespace

Block

Code:

if (sum> 100)

{

int a= sum1+sum2;

}

Here the variable a is defined inside the Block {} and it scope is inside {} and cannot access the “a” outside of the block ,if try to access will give error.

Procedure Scope

code

Internal string  GetConnection()

{

String message=”Hello Procedure Scope”;

Response.Write(message);

}

In this sample message is declared and can be used in the method GetConnection()

Class Scope

Code:

Public static class Sample{

private string myMsg;

void SetMessage ()

{

myMsg = "Hello World!";

}

void ShowMessage ()

{

MessageBox.Show(myMsg);

}

}

In this sample “myMsg” is declared inside the Sample and used in two procedures