System.Web.HttpRequest.GetSubStream C# (CSharp) Method

		static Stream GetSubStream (Stream stream)
		{
#if !TARGET_JVM
			if (stream is IntPtrStream)
				return new IntPtrStream (stream);
#endif

			if (stream is MemoryStream) {
				MemoryStream other = (MemoryStream) stream;
				return new MemoryStream (other.GetBuffer (), 0, (int) other.Length, false, true);
			}

			if (stream is TempFileStream) {
				((TempFileStream) stream).SavePosition ();
				return stream;
			}

			throw new NotSupportedException ("The stream is " + stream.GetType ());
		}