Assembly: mscorlib (in mscorlib.dll)
The value in a set operation is null (Nothing).
A new value cannot be assigned in a set operation because the current EncoderFallbackBuffer object contains data that has not been encoded yet.
A fallback occurred (see Character Encoding in the .NET Framework for fuller explanation)
is set to EncoderExceptionFallback.
The EncoderFallback object represents an error handler that is invoked when a character cannot be converted into an encoded byte sequence.
Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.