How can we declare Optional Parameters in C#.net? [duplicate]

Answer 1

Have a look at following code

Library to use

using System.Runtime.InteropServices;

Function declaration

private void SampleFunction([Optional]string optionalVar, string strVar)
{
}

And while giving call to function you can do like this

SampleFunction(optionalVar: "someValue","otherValue");

OR

SampleFunction("otherValue");

Reply if it helps.!:)