C#实现Json转Unicode的方法

private string JsonToUnicode(string input) {   input = input.Replace("///"", "/"");   input = input.Replace("///", "/");   string result;   if (!input.Contains("//u"))   {  result = input;   }   else   {  StringBuilder stringBuilder = new StringBuilder();  if (input.IndexOf("//u") > 0)  {    stringBuilder.Append(input.Substring(0, input.IndexOf("//u")));    input = input.Substring(input.IndexOf("//u"));  }  if (!string.IsNullOrEmpty(input))  {    string[] array = input.Split(new string[]    {  "//u"    }, StringSplitOptions.RemoveEmptyEntries);    string[] array2 = array;    for (int i = 0; i < array2.Length; i++)    {  string text = array2[i];  if (text.Length > 4)  {    string arg = text.Substring(4);    stringBuilder.Append((char)int.Parse(text.Substring(0, 4), NumberStyles.HexNumber) + arg);  }  else  {    if (text.Length == 4)    {   stringBuilder.Append((char)int.Parse(text, NumberStyles.HexNumber));    }    else    {   if (text.Length < 4 && text.Length > 0)   {     stringBuilder.Append(text);   }    }  }    }  }  result = stringBuilder.ToString();   }   return result; }