func2.csx

interface ObjectProcessor4
{
    bool CanProcess(DomainObject x, out Func<Result> doProcess);
}
 
public Result DoProcessing4(ObjectProcessor4 processor, DomainObject x)
{
    Action doProcess;
    if (processor.CanProcess(x, out doProcess))
    {
        // Here, the validation is done and we know it will work - unless the object has changed
        return doProcess();
    }
 
    throw new InvalidOperationException("Validation failed, but we don't know why");
}