ProjectInstaller.ProjectInstaller_AfterInstall C# (CSharp) Method

      void ProjectInstaller_AfterInstall(object sender, InstallEventArgs e)
      {
        string path = this.Context.Parameters["DIR"] + "YourFileName.config";
        // make sure you replace your filename with the filename you actually
        // want to read
        // Then You can read your config using XML to Linq Or you can use
        // WebConfigurationManager whilst omitting the .config from the path
      }