Add a program in Asp.net(C#) to realize the function of verification code.

Add a web form, and then add the following code. And rename the form to check code aspx public class validate code: system web ui page {private void page _ load (object sender system eventargs e). {thiscreatecheckcodeimage (generatescheckcodee ()} # The code generated by the regional Web form designer overwrites the protected void (eventargese) on init {//codegen: This call is for ASP NET Web form designer//initializecomponent () base on init (e)}//