Generic Parameters in IronRuby

// here's the C# code we have to use

namespace Application
{
    public class Factory
    {
        public T Get<T>(string parameter) where T : Proxy
        {
            return default(T);
        }

        public T Get<T>(Parameter parameter) where T : Proxy
        {
            return default(T);
        }
    }

    public class Parameter
    {
        public string Key { get; set; }
    }

    public class Proxy
    {
        public Proxy()
        {
            Value = "ABC";
        }

        public string Value { get; protected set; }
    }

    public class AlternativeProxy : Proxy
    {
        public AlternativeProxy()
        {
            Value = "DEF";
        }
    }
}


// and dropping the dll in the same directory as this ruby script

require 'Application.dll'

class Script
	def initialize()
		@factory = Application::Factory.new
	end
	
	def test_with_string()
		method = @factory.method(:Get).of(Application::Proxy)
		puts method.to_s # method seems to be correct
		result = method.call("something")
		puts result.class # NilClass here
		puts result.Value # null reference exception here
	end	
	
	def test_with_parameter()
		parameter = Parameter.new
		parameter.Key = "foo"
		result = @factory.method(:Get).of(Application::AlternativeProxy).call(parameter)
		puts result.class
		puts result.Value
	end	
end


proxy = Script.new
puts "Run first test"
puts proxy.test_with_string()
# puts "Run second test"
# puts proxy.test_with_parameter()