equality operators are always prefered in C#

since the default object.Equals(object) does nothing more than object.ReferenceEquals(object)

shadowsocks-csharp/3rd/zxing/common/reedsolomon/GenericGFPoly.cs

@@ -145,7 +145,7 @@ namespace ZXing.Common.ReedSolomon
 
       internal GenericGFPoly addOrSubtract(GenericGFPoly other)
       {
-         if (!field.Equals(other.field))
+         if (field != other.field)
          {
             throw new ArgumentException("GenericGFPolys do not have same GenericGF field");
          }
@@ -181,7 +181,7 @@ namespace ZXing.Common.ReedSolomon
 
       internal GenericGFPoly multiply(GenericGFPoly other)
       {
-         if (!field.Equals(other.field))
+         if (field != other.field)
          {
             throw new ArgumentException("GenericGFPolys do not have same GenericGF field");
          }
@@ -246,7 +246,7 @@ namespace ZXing.Common.ReedSolomon
 
       internal GenericGFPoly[] divide(GenericGFPoly other)
       {
-         if (!field.Equals(other.field))
+         if (field != other.field)
          {
             throw new ArgumentException("GenericGFPolys do not have same GenericGF field");
          }

shadowsocks-csharp/3rd/zxing/qrcode/encoder/Encoder.cs

@@ -514,7 +514,8 @@ namespace ZXing.QrCode.Internal
                               BitArray bits,
                               String encoding)
       {
-        if (mode.Equals(Mode.BYTE))
+         // TODO: check the purpose of this .Equals(obj)
+        if (mode == Mode.BYTE)
             append8BitBytes(content, bits, encoding);
             else
                 throw new WriterException("Invalid mode: " + mode);