To switch solution-wide analysis on
  1. Either choose ReSharper | Options | Code Inspection | Settings, select Enable code analysis and Analyze errors in whole solution, or, alternatively, double-click the gray circle in the right corner of the status bar.
  2. When the Solution-Wide Analysis pop-up warning displays, click OK.
  3. Optionally, you can configure the list of files and folders to skip when analyzing the solution for errors. To do that, click Edit Items to Skip in the Settings tab and then, when the Skip Files and Folders dialog box opens, use Add File and Add Folder buttons to specify files or folders to skip:
    Options__Code_Inspection__Settings__Skip_Files_and_Folders
  4. Click OK.