要在XNA中创建计时器，您可以使用以下方法:

To create a timer in XNA you could use something like this:

int counter = 1;
int limit = 50;
float countDuration = 2f; //every  2s.
float currentTime = 0f;

currentTime += (float)gameTime.ElapsedGameTime.TotalSeconds; //Time passed since last Update() 

if (currentTime >= countDuration)
{
    counter++;
    currentTime -= countDuration; // "use up" the time
    //any actions to perform
}
if (counter >= limit)
{
    counter = 0;//Reset the counter;
    //any actions to perform
}

我绝不是C#或XNA方面的专家，因此，我感谢任何提示/建议.

I am by no means an expert on C# or XNA as well, so I appreciate any hints/suggestions.