Seeking to any location beyond the length of the stream is supported.
Do not use the Seek method to determine the new position in the stream if the MemoryStream was initialized with a non-zero offset. If you do, Seek will return an inaccurate value. Instead, use the Position property to get the new position of the stream.
Universal Windows Platform Available since 4.5 .NET Framework Available since 1.1 Portable Class Library Supported in: portable .NET platforms Silverlight Available since 2.0 Windows Phone Silverlight Available since 7.0 Windows Phone Available since 8.1