using System; using System.Collections.Generic; using System.Linq; using System.Runtime.CompilerServices; using System.Text; using System.Threading.Tasks; namespace Rs.Framework { public static class StringEx { public static string SubLastChar(this string str) { return str.Substring(0, str.Length - 1); } public static string GetLastChar(this string str) { return str.Substring(str.Length - 1); } } }