using System;

using System.Text.RegularExpressions;

public class Program

{

    public static void Main()

    {

        string noUnicode = "此检查项己被你忽略，请联系医生。内科";

        // You MUST add a "@" before the string, otherwise, the "u2028" will

        // get escaped and converted to its corresponding Unicode character.

​

        string s = @"此检查项己被你忽略，请联系医生。\u2028内科";

        string ss = Regex.Replace(s, @"\\u[0-9A-Fa-f]{4}", string.Empty);

        Console.WriteLine("s = " + s);

        Console.WriteLine("ss = " + ss);

        Console.WriteLine(ss == noUnicode);

    }

}