public void SetUpFixture() { string fileName1 = @"C:\Projects\Test\wixext\test.dll"; string fileName2 = @"C:\Projects\Test\mainext\main.dll"; project = WixBindingTestsHelper.CreateEmptyWixProject(); project.AddWixExtensions(new string[] { fileName1, fileName2 }); wixExtensionProjectItemCount = 0; foreach (ProjectItem item in project.Items) { if (item is WixExtensionProjectItem) { ++wixExtensionProjectItemCount; } } }