Convert multiple consecutive spaces in a C# string to one space

   #region 字符串中多个连续空格转为一个空格
        /// <summary>
        /// 字符串中多个连续空格转为一个空格
        /// </summary>
        /// <param name="str">待处理的字符串</param>
        /// <returns>合并空格后的字符串</returns>
        public static string MergeSpace(string str)
        {
            if (str != string.Empty &&
                str != null &&
                str.Length > 0
                )
            {
                str = new System.Text.RegularExpressions.Regex("[\\s]+").Replace(str, " ");
            }
            return str;
        }


        #endregion