System.Text.UTF7Encoding.DecoderUTF7FallbackBuffer.MovePrevious C# (CSharp) Метод

            public override bool MovePrevious()
            {
                if (iCount >= 0)
                {
                    iCount++;
                }

                // return true if we were allowed to do this
                return (iCount >= 0 && iCount <= iSize);
            }