How to check Checkbox checked using C# and VB.Net in ASP.Net

sir,

i have tryied it in my code its working fine on newly created page but on my page where i need to do it , it is return false while code is same as working code 

Hi yogeshc,

Please delete that checkbox and add new checkbox with same id and try to access it it will work.

sir, your given code working fine but when i add some other asp control to the page it starting return false

Hi yogeshc,

It will return false if you havent checked the checkbox if you have checked it then it will return true so put a debug and check your code where you are missing something. Because i have already provided you a sample and cant remotely check your code.