public void OpenAppendStream(IFileInfo fileInfo)
{
AppendStream = FileAppender.CreateAppendStream(fileInfo);
// the compiler creates a cached delegate for non-capturing lambda expressions,
// so frequent allocation in the case of LogFileAccessMode.OpenTemporarily can be avoided this way
EnsurePreambleAsync = async(logFile, cancellationToken) =>
{
if (logFile.AppendStream.Length == 0)
{
await WriteBytesAsync(logFile, logFile.Encoding.GetPreamble(), cancellationToken).ConfigureAwait(false);
}
logFile.EnsurePreambleAsync = (lf, ct) => default;
};
}
internal void Open(IFileInfo fileInfo)
{
_appendStream = FileAppender.CreateAppendStream(fileInfo);
ShouldEnsurePreamble = true;
}