如何根据特定的记录数从1到100运行进度条

i have a list in c# which holds some records. i am populating this list in a grid and while populating i am showing a progress bar on screen. now problem is that when number of records is in millions it took too much time to get populate in grid and meanwhile progress bar reaches to its max level i.e. 100% and stuck over there. i want to run progress bar in such a way that it must be progressed same for any number of records. please helpi have a list in c# which holds some records. i