System.DefaultBinder.CanConvertPrimitive C# (CSharp) Method

        private static extern bool CanConvertPrimitive(RuntimeType source,RuntimeType target);

        private static int FindMostSpecificType(Type c1, Type c2, Type t)
        {
            if (c1 == c2)
            {
                return(0);
            }
            if (c1 == t)
            {
                return(1);
            }
            if (c2 == t)
            {
                return(2);
            }
            if (c1.IsByRef || c2.IsByRef)
            {
                if (c1.IsByRef && c2.IsByRef)
                {
                    c1 = c1.GetElementType();
                    c2 = c2.GetElementType();
                }
                else if (c1.IsByRef)
                {
                    if (c1.GetElementType() == c2)
                    {
                        return(2);
                    }
                    c1 = c1.GetElementType();
                }
                else
                {
                    if (c2.GetElementType() == c1)
                    {
                        return(1);
                    }
                    c2 = c2.GetElementType();
                }
            }
            bool flag1;
            bool flag2;

            if (c1.IsPrimitive && c2.IsPrimitive)
            {
                flag1 = DefaultBinder.CanConvertPrimitive((RuntimeType)c2, (RuntimeType)c1);
                flag2 = DefaultBinder.CanConvertPrimitive((RuntimeType)c1, (RuntimeType)c2);
            }
            else
            {
                flag1 = c1.IsAssignableFrom(c2);
                flag2 = c2.IsAssignableFrom(c1);
            }
            if (flag1 == flag2)
            {
                return(0);
            }
            return(flag1 ? 2 : 1);
        }