Shared.MutableMemoryStream.Seek C# (CSharp) Method

        public override long Seek(long offset, SeekOrigin loc)
        {
            if (!_isOpen)
                throw new InvalidOperationException();

            if (offset > _memStreamMaxLength)
                throw new ArgumentOutOfRangeException("offset");

            switch (loc)
            {
                case SeekOrigin.Begin:
                    {
                        var tempPosition = unchecked(_origin + (int)offset);
                        if (offset < 0 || tempPosition < _origin)
                            throw new IOException();

                        _position = tempPosition;
                        break;
                    }
                case SeekOrigin.Current:
                    {
                        var tempPosition = unchecked(_position + (int)offset);
                        if (unchecked(_position + offset) < _origin || tempPosition < _origin)
                            throw new IOException();

                        _position = tempPosition;
                        break;
                    }
                case SeekOrigin.End:
                    {
                        var tempPosition = unchecked(_length + (int)offset);
                        if (unchecked(_length + offset) < _origin || tempPosition < _origin)
                            throw new IOException();

                        _position = tempPosition;
                        break;
                    }
                default:
                    throw new ArgumentException();
            }

            return _position;
        }