gistfile1.cs

public static object CreateInstanceGeneric(Type source, Type[] typeArguments, params object[] args)
{
    object result = null;

    Type genericType = source.MakeGenericType(typeArguments);

    try
    {
        result = Activator.CreateInstance(genericType, args);
    }
    catch
    {
        result = FormatterServices.GetUninitializedObject(genericType);
    }

    return result;
}