CSHARP

c# optional parameters

// Using Attribute
private void SomeMethod([Optional] string param)
{

}

// Using Default Values
private void SomeMethod(string param = null)
{

}

c# optional parameters

// Using Optional Attribute
private void SomeMethod([Optional] string param)
{
    ...
}

// Using Default Values
private void SomeMethod(string param = null)
{
    ...
}

optional arguments c#

public void ExampleMethod(int required,
                          string optionalstr = "default string",
    				      int optionalint = 10)

C# optional arguments

public void SomeMethod(int a, int b = 0){/*some code*/}

how to pass an optional parameter in c# mvc asp.net

public ActionResult Index(string Country, int Regions = 2)

c# optional parameters using

 using System.Runtime.InteropServices;