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; 
}