添加项目文件。

WpfAnimatedGif/Decoding/GifDecoderException.cs

@@ -0,0 +1,16 @@
+using System;
+
+namespace WpfAnimatedGif.Decoding
+{
+    [Serializable]
+    internal class GifDecoderException : Exception
+    {
+        internal GifDecoderException() { }
+        internal GifDecoderException(string message) : base(message) { }
+        internal GifDecoderException(string message, Exception inner) : base(message, inner) { }
+        protected GifDecoderException(
+          System.Runtime.Serialization.SerializationInfo info,
+          System.Runtime.Serialization.StreamingContext context)
+            : base(info, context) { }
+    }
+}