IIS Pool Stop issue in asp.net?

i don't know where i am stuck, but whenever i created the object of o开发者_Go百科ne of the class from App_Code, my sites pool stops, i dont understand whats wrong, with that class, everything is straightforward.

i have BAL and DAL created under App_Code, when i create the object of BAL, the App_Pool Stops.

here is a the BAL and DAL

Please can anyone help me with this, i am stuck here for the last 2 weeks.

Check your event logs, you probably have a permission problem that is crashing the pool inside of your BAL/DAL.

1. Open Event Viewer by clicking the Start button Picture of the Start button, clicking Control Panel, clicking System and Security, clicking Administrative Tools, and then double-clicking Event Viewer.‌ Administrator permission required If you're prompted for an administrator password or confirmation, type the password or provide confirmation.

2. Click the Error first, then check the Application event log.

3. Look for red error icons.