ReadAsync() [1/2]

override Task< int > System.IO.StreamReader.ReadAsync ( char[] buffer, int index, int count )

inlinevirtualinherited

Reimplemented from System.IO.TextReader.

Definition at line 803 of file StreamReader.cs.

    {
        if (buffer == null)
        {
            throw new ArgumentNullException("buffer", SR.ArgumentNull_Buffer);
        }
        if (index < 0 || count < 0)
        {
            throw new ArgumentOutOfRangeException((index < 0) ? "index" : "count", SR.ArgumentOutOfRange_NeedNonNegNum);
        }
        if (buffer.Length - index < count)
        {
            throw new ArgumentException(SR.Argument_InvalidOffLen);
        }
        if (GetType() != typeof(StreamReader))
        {
            return base.ReadAsync(buffer, index, count);
        }
        ThrowIfDisposed();
        CheckAsyncTaskInProgress();
        return (Task<int>)(_asyncReadTask = ReadAsyncInternal(new Memory<char>(buffer, index, count), CancellationToken.None).AsTask());
    }

References System.IO.StreamReader._asyncReadTask, System.SR.Argument_InvalidOffLen, System.SR.ArgumentNull_Buffer, System.SR.ArgumentOutOfRange_NeedNonNegNum, System.Threading.Tasks.ValueTask< TResult >.AsTask(), System.buffer, System.IO.StreamReader.CheckAsyncTaskInProgress(), System.count, System.index, System.Threading.CancellationToken.None, System.IO.StreamReader.ReadAsyncInternal(), and System.IO.StreamReader.ThrowIfDisposed().