System.Yaml.UriEncoding.Unescape C# (CSharp) Méthode

        public static string Unescape(string s)
        {
            s = s.Replace('+', ' ');

            var result = new StringBuilder();
            var p = 0;
            int pp;
            while ( ( pp = s.IndexOf('%', p) ) >= 0 ) {
                result.Append(s.Substring(p, pp - p));
                p = pp;
                var c0 = ( HexToInt(s[p + 1]) << 4 ) + HexToInt(s[p + 2]);
                if ( c0 < 0x80 ) {
                    p += 3;
                    result.Append((char)c0);
                    continue;
                }
                var c1 = ( HexToInt(s[p + 4]) << 4 ) + HexToInt(s[p + 5]);
                if ( c0 < 0xe0 ) {
                    p += 6;
                    var c = (char)( ( ( c0 & 0x1f ) << 6 ) + ( c1 & 0x7f ) );
                    result.Append(c);
                    continue;
                }
                var c2 = ( HexToInt(s[p + 7]) << 4 ) + HexToInt(s[p + 8]);
                if ( c0 < 0xf1 ) {
                    p += 9;
                    var c = (char)( ( ( c0 & 0x0f ) << 12 ) + ( ( c1 & 0x7f ) << 6 ) + ( c2 & 0x7f ) );
                    result.Append(c);
                    continue;
                }
                throw new FormatException("Charcorde over 0xffff is not supported");
            }
            return result.Append(s.Substring(p)).ToString();
        }

 /// <summary>
 /// Unescape the string escaped in URI encoding format.
 /// </summary>
 /// <param name="s">String to be unescape.</param>
 /// <returns>Unescaped string.</returns>
 public static string UriUnescape(this string s)
 {
     return(UriEncoding.Unescape(s));
 }