.net reflection and the "params" keyword

Question

In .net, is there a way using reflection to determine if a parameter on a method is marked with the "params" keyword?

Answer 1

Test to see whether the final ParameterInfo has ParamArrayAttribute applied to it.

Answer 2

Check to see if a ParamArrayAttribute has been applied to the ParameterInfo object:

static void Main()
{
    //use string.Format(str, args) as a test
    var method = typeof (string).GetMethod(
        "Format",
        new[] {typeof (string), typeof (object[])});
    var param = method.GetParameters()[1];
    Console.WriteLine(IsParams(param));
}
static bool IsParams(ParameterInfo param)
{
    return Attribute.IsDefined(param, typeof (ParamArrayAttribute));
}