Visual Studio 2026 Issue

Question

Have installed Visual Studio 2026, when finished and want to close, notice appears on the screen from the Visual Studio Installer "Do you want this app to make a change to your computer?". Sounds like the installer has not completed the installation?

Also, Have a file of C# instructions called Program.cs in one of my directories. When I create a new C# application, point to a specific folder and name, it creates a new solution. I then open my file called Program.cs, Visual Studio copies into the present screen, I build the solution and then run without debugging, the system outputs "Hello World". I know that this is the beginning programmer sample but even when I eliminate one of the program names at the top of the screen, my program still in view, re-build, still outputs "Hello World". I am new to Visual Studio and have programmed many other systems but this one is frustrating. I assume once learned will be easier. Any ideas will be appreciated, Sid Kraft

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Answer 1

Thank you for reaching out.

This happens because Visual Studio always runs the project, not the file you just open on the screen.

When you create a new C# project, Visual Studio automatically creates a project that already contains a Program.cs file with Hello World code. That file becomes the project’s entry point. Visual Studio will always build and run that file unless the project itself is changed.

If you later open another Program.cs from a folder, Visual Studio only opens it for viewing. That file is not part of the project, so it is ignored when you build and run. Even if that file is visible or active in the editor, Visual Studio still runs the original Hello World program because it belongs to the project.

This behavior does not happen every time you open Visual Studio. It happens when a new project is created, because the Hello World code is added once as part of the project template. After that, Visual Studio simply keeps running the project’s entry point.

Reference:

explains that when a new C# console project is created, Visual Studio opens a project that already includes default Hello World code in Program.cs, and that file is what runs when you start the app: https://learn.microsoft.com/en-us/visualstudio/get-started/csharp/tutorial-console?view=visualstudio

Please let us know if you require any further assistance, we’re happy to help. If you found this information useful, kindly mark this as "Accept Answer". So that others in the community facing similar issues can easily find the solution. Your contribution is highly appreciated.

Answer 2

That message—‘Do you want this app to make a change to your computer?’—is actually a standard Windows security feature called User Account Control (UAC). I see it every time I launch Visual Studio because I have mine configured to 'Run as Administrator.' Since the app is requesting elevated privileges to interact with system resources, Windows is just double-checking with you before it grants that access.

As for your second point, I’m a little stuck on the context: What exactly do you mean by 'eliminating one of the program names'? Could you walk me through the specific steps you’re taking when you do that? Once I understand that part of the workflow, I can give you a better answer.