Is there a way to use NUnit TestCase attribute with optional arguments

Question

I'm trying to run some test cases but I need to make one of the arguments optional.

I've tried the following but NUnit ignores the tests and prints the following "ignored: Wrong number of arguments provided"

[TestCase(Result = "optional")]
[TestCase("set", Result = "set")]
public string MyTest(string optional = "optional")
{
    return optional;          
}

Is it possible to run test cases with optional arguments?

Answer 1

Just make 2 test in this case, optional paramerters are not supported in nunit:

[TestCase("set", Result = "set")]
public string MyTest(string optional)
{
    return optional;          
}

[TestCase(Result = "optional")]
public string MyTest()
{
    return MyTest("optional");          
}