c#语法 try..catch..finally

           bool isSent=false 
            try
            {

            }
            catch(Exception ex)
            {
                //write log
         
                throw ex;
            }
            finally
            {
　　　　　　　　　　//不管上面是否有异常，这段都会执行
                //write log
            }
            return isSent;