How to use Optional Parameter in C#

We can use optional parameter by the following  way:

Solution:

Syntax :

=====

We need to set "string Id=""" called as optional parameter

Here "string Id=" is the variable declaration

all the optional parameters should declare after required parameters

 example:

=============

private void GetSelectedItems(Label lbltest,string Id="")

{

    

}

//calling function using optional parameter

          GetSelectedItems(mylable,"lbltest");

//calling function without using optional parameter

 GetSelectedItems(mylable);