In this article. I will explain how to prevent re-submitting data on browser page reload or refresh in your asp.Net webform using C#. Sometimes we have some web pages through which we submit some user data to the database one after another on the same page. But the problem is, when we submit one user data and then refresh/reload our browser, what happens? The previously submitted data is re-submitted to the database. Here i am going to tell you how to prevent that.