diff --git a/shadowsocks-csharp/3rd/zxing/GenericGF.cs b/shadowsocks-csharp/3rd/zxing/GenericGF.cs
index d7b8d350..08f8ca0e 100755
--- a/shadowsocks-csharp/3rd/zxing/GenericGF.cs
+++ b/shadowsocks-csharp/3rd/zxing/GenericGF.cs
@@ -28,14 +28,7 @@ namespace ZXing.Common.ReedSolomon
    /// <author>Sean Owen</author>
    public sealed class GenericGF
    {
-      public static GenericGF AZTEC_DATA_12 = new GenericGF(0x1069, 4096, 1); // x^12 + x^6 + x^5 + x^3 + 1
-      public static GenericGF AZTEC_DATA_10 = new GenericGF(0x409, 1024, 1); // x^10 + x^3 + 1
-      public static GenericGF AZTEC_DATA_6 = new GenericGF(0x43, 64, 1); // x^6 + x + 1
-      public static GenericGF AZTEC_PARAM = new GenericGF(0x13, 16, 1); // x^4 + x + 1
       public static GenericGF QR_CODE_FIELD_256 = new GenericGF(0x011D, 256, 0); // x^8 + x^4 + x^3 + x^2 + 1
-      public static GenericGF DATA_MATRIX_FIELD_256 = new GenericGF(0x012D, 256, 1); // x^8 + x^5 + x^3 + x^2 + 1
-      public static GenericGF AZTEC_DATA_8 = DATA_MATRIX_FIELD_256;
-      public static GenericGF MAXICODE_FIELD_64 = AZTEC_DATA_6;
 
       private int[] expTable;
       private int[] logTable;
diff --git a/shadowsocks-csharp/3rd/zxing/Mode.cs b/shadowsocks-csharp/3rd/zxing/Mode.cs
index 548ea6d7..df1a5ebb 100755
--- a/shadowsocks-csharp/3rd/zxing/Mode.cs
+++ b/shadowsocks-csharp/3rd/zxing/Mode.cs
@@ -38,44 +38,10 @@ namespace ZXing.QrCode.Internal
 
       // No, we can't use an enum here. J2ME doesn't support it.
 
-      /// <summary>
-      /// 
-      /// </summary>
-      public static readonly Mode TERMINATOR = new Mode(new int[] { 0, 0, 0 }, 0x00, "TERMINATOR"); // Not really a mode...
-      /// <summary>
-      /// 
-      /// </summary>
-      public static readonly Mode NUMERIC = new Mode(new int[] { 10, 12, 14 }, 0x01, "NUMERIC");
-      /// <summary>
-      /// 
-      /// </summary>
-      public static readonly Mode ALPHANUMERIC = new Mode(new int[] { 9, 11, 13 }, 0x02, "ALPHANUMERIC");
-      /// <summary>
-      /// 
-      /// </summary>
-      public static readonly Mode STRUCTURED_APPEND = new Mode(new int[] { 0, 0, 0 }, 0x03, "STRUCTURED_APPEND"); // Not supported
       /// <summary>
       /// 
       /// </summary>
       public static readonly Mode BYTE = new Mode(new int[] { 8, 16, 16 }, 0x04, "BYTE");
-      /// <summary>
-      /// 
-      /// </summary>
-      public static readonly Mode ECI = new Mode(null, 0x07, "ECI"); // character counts don't apply
-      /// <summary>
-      /// 
-      /// </summary>
-      public static readonly Mode KANJI = new Mode(new int[] { 8, 10, 12 }, 0x08, "KANJI");
-      /// <summary>
-      /// 
-      /// </summary>
-      public static readonly Mode FNC1_FIRST_POSITION = new Mode(null, 0x05, "FNC1_FIRST_POSITION");
-      /// <summary>
-      /// 
-      /// </summary>
-      public static readonly Mode FNC1_SECOND_POSITION = new Mode(null, 0x09, "FNC1_SECOND_POSITION");
-      /// <summary>See GBT 18284-2000; "Hanzi" is a transliteration of this mode name.</summary>
-      public static readonly Mode HANZI = new Mode(new int[] { 8, 10, 12 }, 0x0D, "HANZI");
 
       private readonly int[] characterCountBitsForVersions;
       private readonly int bits;
@@ -100,27 +66,8 @@ namespace ZXing.QrCode.Internal
       {
          switch (bits)
          {
-            case 0x0:
-               return TERMINATOR;
-            case 0x1:
-               return NUMERIC;
-            case 0x2:
-               return ALPHANUMERIC;
-            case 0x3:
-               return STRUCTURED_APPEND;
             case 0x4:
                return BYTE;
-            case 0x5:
-               return FNC1_FIRST_POSITION;
-            case 0x7:
-               return ECI;
-            case 0x8:
-               return KANJI;
-            case 0x9:
-               return FNC1_SECOND_POSITION;
-            case 0xD:
-               // 0xD is defined in GBT 18284-2000, may not be supported in foreign country
-               return HANZI;
             default:
                throw new ArgumentException();
          }
@@ -164,16 +111,5 @@ namespace ZXing.QrCode.Internal
             return bits;
          }
       }
-
-      /// <summary>
-      /// Returns a <see cref="System.String"/> that represents this instance.
-      /// </summary>
-      /// <returns>
-      /// A <see cref="System.String"/> that represents this instance.
-      /// </returns>
-      public override String ToString()
-      {
-         return name;
-      }
    }
 }
\ No newline at end of file