Always Demand Appropriate Permissions

Requesting permissions is how you let the .NET common language runtime know what your code needs to do to get its job done. Although requesting permissions is optional and is not required for your code to compile, there are important execution reasons for requesting appropriate permissions within your code.

When your code demands permissions by using the Demand method, the common language runtime verifies that all code calling your code has the appropriate permissions. Without these permissions, the request fails. Verification of permissions is determined by performing a stack-walk.

Requesting permissions increases the likelihood that your code will run properly if it s allowed to execute. If you do not identify the minimum set of permissions your code requires to run, your code will require extra error-handling code to gracefully handle the situations in which it is not granted one or more permissions. Requesting permissions helps ensure that your code is granted only the permissions it needs. You should request only those permissions that your code needs, and no more.

If your code does not access protected resources or perform security-sensitive operations, it is not necessary to request any permissions.