怎么捕获抛出的错误

如何捕获抛出的异常
我在一个类里catch里throw   e   了一个错误，我怎么才可以在调用这个类的地方捕获这个异常呢？
谢谢

------解决方案--------------------------------------------------------
protected void button1_click(object sender,EventArgs e)
{
try
{
aaa();
}
catch(Exception e)
{
Response.write(e.Message);
}
}

private void aaa()
{
throw new Exception( "这个异常是从aaa里抛出的. ")
}

------解决方案--------------------------------------------------------
try
{
Callyourmethod();//maybe throw exception
}
catch(Excepion ex)
{
//if Callyourmethod() throw Exception,you can catch at here
do something here;
}

------解决方案--------------------------------------------------------
看书去～