C#

using System.Threading;
...

private Timer _operationTimeout = null;

private void CheckOperation(MyOperationData data, int timeout)
{
    // run this timer a single time...
    _operationTimeout = new Timer(new TimerCallback(CheckValue), data, timeout, Timeout.Infinite);
}
// this method will be called by the timeout timer, once the interval has elapsed
private void CheckValue(object data)
{
    MyOperationData opData = (MyOperationData)data;
    // check the result, if it is not the expected value throw the timeout exception
    if (!opData.Value.Equals(opData.ExpectedValue))
        throw opData.TimeoutException;
}