Default Value for Optional Parameters

[TonyValenti]

Given:

static void Test(string? V1 = "V1", long? V2 = 200, string? V3 = "V3", long? V4 = 400) { }

There is no way to skip optional parameters unless you do it nominally. ie:
Test(V4: 50);

It would be nice if one of the following syntaxes would mean "Use the default value for the argument as provided by the method signature":

Test(_, 100, "Value", 400);
Test(*, 100, "Value", 400);

Please note that this is different from using default as that means "default for the type". For clarity:

//These two calls are equivalent
Test(default, 100, "Value", 400);
Test(null, 100, "Value", 400);

//And these two calls are equivalent:
Test("V1", 100, "Value", 400);
Test(_, 100, "Value", 400);