internal unsafe void Cancel()
{
if (this.IsCompleted || this._handle.IsInvalid || Win32Native.CancelIoEx(this._handle, this._overlapped))
{
return;
}
int lastWin32Error = Marshal.GetLastWin32Error();
if (lastWin32Error == 1168)
{
return;
}
__Error.WinIOError(lastWin32Error, string.Empty);
}