Get Bin Directory Path using C# for web application as well as class library

We may get the requirement while coding in C# like we need to get the bin path  of class library or Web application.

the following is the sample code which works for class library as well as web application.

string binPath = Path.GetDirectoryName((new System.Uri(Assembly.GetExecutingAssembly().CodeBase)).LocalPath)

Application pool always getting stopped

I have a problem like SecurityTokenServiceApplicationPool always getting stopped when I am opening Sharepoint manager 2013.
After research for this problem on google and gone through the EventViewer and found that this is the problem with the user credentials for the applicationpool running under the specified user. Password for my user got expired.

Solution: Make sure password for the user is correct and it is not expired. If it is expired please update with new password.