public override async Task WriteBase64TextAsync(byte[] trailBytes, int trailByteCount, byte[] buffer, int offset, int count) { if (trailByteCount > 0) { await InternalWriteBase64TextAsync(trailBytes, 0, trailByteCount).ConfigureAwait(false); } await InternalWriteBase64TextAsync(buffer, offset, count).ConfigureAwait(false); }