InvalidCastException thrown from InvokeConstructor if passing more than 14 params arguments

[jdh28]

I have a class that I'm creating dynamically via Impromptu.InvokeConstructor that has params arguments. If I pass in 14 arguments it works, but 15 causes an InvalidCastException:

System.InvalidCastException: The result type 'ImpromptuParamsArgs.MyClass' of the dynamic binding produced by binder 'Microsoft.CSharp.RuntimeBinder.CSharpInvokeConstructorBinder' is not compatible with the result type 'System.Type' expected by the call site.

Here is some example code:

    class Program
    {
        static void Main(string[] args)
        {
            var parameters = Enumerable.Range(0, 15).Select(i => i.ToString() as object).ToArray();
            var instance = Impromptu.InvokeConstructor(typeof(MyClass), parameters);
            Console.Out.WriteLine(instance.Args);
        }
    }

    public class MyClass
    {
        public readonly string Args;

        public MyClass(params string[] args)
        {
            Args = String.Join(",", args);
        }
    }

[jbtule]

This code is going to be deprecated in ImpromptuInterface and lives on in a library called Dynamitey, so i've moved the issue there. ekonbenefits/dynamitey#3