Method invoke by reflection - Fixed version of http://stackoverflow.com/questions/2202381/reflection-how-to-invoke-method-with-parameters

MethodInvoke

Assembly assembly = Assembly.LoadFile("...Assembly1.dll");
Type type = assembly.GetType("TestAssembly.Main");
if (type != null)
{
    MethodInfo methodInfo = type.GetMethod(methodName);
    if (methodInfo != null)
    {
        object result = null;
        ParameterInfo[] parameters = methodInfo.GetParameters();
        object classInstance = Activator.CreateInstance(type, null);
        if (parameters.Length == 0)
        {
            result = methodInfo.Invoke(classInstance, null);
        }
        else
        {
            object[] parametersArray = new object[] { "Hello" };          
            result = methodInfo.Invoke(classInstance, parametersArray);
        }
    }
}