SftpWriteRequest
Gets the buffer holding the data to write.
            
Gets the length (in bytes) of the data to write.
            
Gets the zero-based offset in  Data at which to begin taking bytes to
            write.
            
Gets the zero-based offset (in bytes) relative to the beginning of the file that the write
            must start at.
            
public SftpWriteRequest(uint protocolVersion, uint requestId, byte[] handle, ulong serverFileOffset, byte[] data, int offset, int length, Action<SftpStatusResponse> statusAction)