VB string.left和string.right作为string的C＃扩展方法

也许我在这里分享的这两种小方法对某人很方便。

        public static string Left(this string input, int length) {
            string result = input;
            if (input != null && input.Length > length) {
                result = input.Substring(0, length);
            }
            return result;
        } 
        public static string Right(this string input, int length) {
            string result = input;
            if (input != null && input.Length > length) {
                result = input.Substring(input.Length - length, length);
            }
            return result;
        }

From: https://bytes.com/topic/c-sharp/insights/918710-vb-string-left-string-right-c-extension-methods-string