What is the best way to catch "Operation cancelled by user" exception

I have the following piece of code:

IAsyncResult beginExecuteReader = command.BeginExecuteNonQuery();

while (!beginExecuteReader.IsCompleted)
{
    if (controllerTask.CancellationTokenSource.IsCancellationRequested)
    {
        command.Cancel();
    }

    Thread.Sleep(100);
}

try
{
    result = command.EndExecuteNonQuery(beginExecuteReader);
}
catch (SqlException exception)
{
    if (exception.ErrorCode == OperationCanceled)
    {
        throw new OperationCanceledException();
    }
    
    throw;
}

How can I identify that the exception caught was caused by operation cancelation?

In this case ExecuteNonQuery throws an exception with error code 0x80131904, but it's a very general exception which can be caused by many reasons. The error message looks like this: "A severe error occurred on the current command. The results, if any, should be discarded.\r\nOperation cancelled by user."

I don't see any options except parsing the error message... Any ideas?

Thanks

PS. Yeah, I know that using the Cancel command for async operation probably is not the best idea, because in the .NET 2.0 documentation on MSDN there was a warning. But in the .NET 4.0 documentation, this warning is removed.
I also don't like other implementations where the cancel method is called from another thread, as for me it makes code more difficult.