Hi,
Do the following actions below, to revert to C# development settings in your Visual Studio IDE (assuming you have VS 2010):
1. Open Visual Studio 2010, in the menu options, go to Tools -> Import and Export Settings…
2. On the first screen in the Import and Export Settings Wizard pop-up window, select the bottom option “Reset all settings” and hit the “Next >” button
3. On the second screen, choose the bottom option “No, just reset settings, overwriting my current settings”, and hit the “Next >” button
4. On the third and final screen, choose the option “Visual C# Development Settings” from the collection of settings in the listbox and hit the “Finish” button
You should be all set then. Good luck.