AppendAllTextAsync() [2/2]

static Task System.IO.File.AppendAllTextAsync ( string path, string? contents, Encoding encoding, CancellationToken cancellationToken = default(CancellationToken) )

inlinestatic

Definition at line 934 of file File.cs.

    {
        if (path == null)
        {
            throw new ArgumentNullException("path");
        }
        if (encoding == null)
        {
            throw new ArgumentNullException("encoding");
        }
        if (path.Length == 0)
        {
            throw new ArgumentException(SR.Argument_EmptyPath, "path");
        }
        if (cancellationToken.IsCancellationRequested)
        {
            return Task.FromCanceled(cancellationToken);
        }
        if (string.IsNullOrEmpty(contents))
        {
            new FileStream(path, FileMode.Append, FileAccess.Write, FileShare.Read).Dispose();
            return Task.CompletedTask;
        }
        return InternalWriteAllTextAsync(AsyncStreamWriter(path, encoding, append: true), contents, cancellationToken);
    }

References System.SR.Argument_EmptyPath, System.IO.File.AsyncStreamWriter(), System.cancellationToken, System.Threading.Tasks.Task< TResult >.CompletedTask, System.IO.FileStream.Dispose(), System.Threading.Tasks.Task< TResult >.FromCanceled(), and System.IO.File.InternalWriteAllTextAsync().