Reflection on a static overloaded method using an out parameter

Question

I\'m having some issues with invoking an overloaded static method with an out parameter via reflection and would appreciate some pointers.

I\'m looking to dynamicall

Answer 1

You need to use the right BindingFlags and use Type.MakeByRefType for out and ref parameters. One second, and I'll have a code sample for you.

For example,

MethodInfo methodInfo = typeof(int).GetMethod(
    "TryParse",
    BindingFlags.Public | BindingFlags.Static,
    Type.DefaultBinder,
    new[] { typeof(string), typeof(int).MakeByRefType() },
    null
);

I should point out that invoking this is a little tricky too. Here's how you do it.

string s = "123";
var inputParameters = new object[] { "123", null };
methodInfo.Invoke(null, inputParameters);
Console.WriteLine((int)inputParameters[1]);

The first null is because we are invoking a static method (there is no object "receiving" this invocation). The null in inputParameters will be "filled" for us by TryParse with the result of the parse (it's the out parameter).