Screen Resolution!!

[rocky_upadhaya]

Since This Problem seems impossible or very hard for my level of knowledge till now and no one is willing to help me on this problem I am very frustated......So Please Suggest me code to change the screen resolution....I have found some code in the internet but was unable to use them cause I didnt knew exact namespace....or something else.......Please help me out here

             string Htscreen = SystemInformation.PrimaryMonitorSize .Height .ToString();
             string WtScreen=SystemInformation.PrimaryMonitorSize.Width .ToString();

I want to keep HtScreen and WtScreen values to change the screen resolution to original state if I exit from the application Bu please Help me on the code for changing screen resolution....