Microsoft.AspNetCore.Buffering.BufferingWriteStream.Seek C# (CSharp) Méthode

        public override long Seek(long offset, SeekOrigin origin)
        {
            if (_isBuffering)
            {
                if (origin != SeekOrigin.Begin)
                {
                    throw new ArgumentException(nameof(origin), nameof(Seek) + " can only be set to " + nameof(SeekOrigin.Begin) + ".");
                }
                if (offset != 0)
                {
                    throw new ArgumentOutOfRangeException(nameof(offset), offset, nameof(Seek) + " can only be set to 0.");
                }
                _buffer.SetLength(offset);
                return _buffer.Seek(offset, origin);
            }
            // Try the inner stream instead, but this will usually fail.
            return _innerStream.Seek(offset, origin);
        }