In visual studio Error List window, you can filter out errors, warnings and messages, by toggling respective buttons highlighted:
You can filter these messages further by selecting one of the following options: open documents, current project and current document:
Suppressing compiler warning messagaes by project:
Steps:
1. Solution explorer > choose project > View menu > Property Pages
2. In the Suppress warnings box, specify the error codes of the warnings that you want to suppress, separated by semicolons, and then rebuild the solution.
How do I copy error messages:
If you wanted to copy an error in vs intellisense, just enable error list:
Steps:
1. select 'View' in menu bar
2. enable 'Error List' which will open error list at the bottom of the screen by default containing all the errors with possibility to copy the message.
Eg:
