Merge branch 'master' of https://github.com/kkguo/SharpZipLib into pr84

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# especially if it merges an updated upstream into a topic branch.
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Author: McNeight

ICSharpCode.SharpZipLib/Zip/Compression/Streams/InflaterInputStream.cs

@@ -481,7 +481,8 @@ public override bool CanWrite {
 		/// </summary>
 		public override long Length {
 			get {
-				return inputBuffer.RawLength;
+				//return inputBuffer.RawLength;
+                throw new NotSupportedException("InflaterInputStream Length is not supported");
 			}
 		}