using System.Text; namespace JXCMS.Core.Extensions { public static class StringExtension { public static bool IsNullOrEmpty(this string str) { return string.IsNullOrEmpty(str); } public static string InsertMultipleString(this string str, string insertStr, int count) { StringBuilder returnValue = new StringBuilder(); for (int i = 0; i < count; i++) { returnValue.Append(insertStr); } returnValue.Append(str); return returnValue.ToString(); } } }