Question

I would think that this should work…but it doesn’t. I get a MissingMemberException.

class Program
{
    static void Main(string[] args)
    {
        typeof(Class1).InvokeMember("Prop",
                                      System.Reflection.BindingFlags.Public |
                                      System.Reflection.BindingFlags.Instance |
                                      System.Reflection.BindingFlags.SetProperty, null, new Class1(), new object[] { TestEnum.One });

        typeof(Class1).InvokeMember("Prop",
                                      System.Reflection.BindingFlags.Public |
                                      System.Reflection.BindingFlags.Instance |
                                      System.Reflection.BindingFlags.SetProperty, null, new Class1(), new object[] { (int)1 });
    }

}

public class Class1
{
    public TestEnum Prop { get; set; }
}

public enum TestEnum : int
{
    One = 1,
    Two,
    Three
}

This seems to contradict the behavior of every other System.Reflection method…any ideas on how to get the DefaultBinder to correctly identify the method to use? Or another approach?

Answer 1

The first one works. Only the second one doesn’t. And the reason therefore is that there is no property with name Prop and type int in Class1. If you cast 1 to TestEnum instead of int it will work.

This behavior is consistent with other Reflection behavior. If the types of the parameters don’t match, the member is not found.