public void TestSelectOrRemoveFileForMultipleSelection()
{
string gitconfigFile = $@"{Environment.GetFolderPath(Environment.SpecialFolder.UserProfile)}\.gitconfig";
FileSystemController fileSystemController = new FileSystemController();
Assert.False(fileSystemController.SelectedFiles.Any());
fileSystemController.SelectOrRemoveFileForMultipleSelection(gitconfigFile);
Assert.Contains(fileSystemController.SelectedFiles, file => file.FullName == gitconfigFile);
fileSystemController.SelectOrRemoveFileForMultipleSelection(gitconfigFile);
Assert.DoesNotContain(fileSystemController.SelectedFiles, file => file.FullName == gitconfigFile);
}