Visual Studio 2022 file-scoped namespace issue

So I have VS 2022 and am trying to learn C#.

I am getting an error of Feature

‘file-scoped namespace’ is not available in C# 7.3 Please use language
10.0 or greater.

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I found where one goes to Options>Code Style> Text Editor and change to File-scoped. Did that.

When I create my solution, I chose Blank Solution
I then added an empty project using .NET framework 4.8
Next I added a code file
Finally I add the following:

namespace Averages;

public static class TestClass
{
 
}

And I get the error. What in the world am I missing? I’m stumped.
Edit: I just checked. I have .NET 7.0

>Solution :

You could solve this by:

namespace Averages 
{ 
   public static class TestClass
   {
 
   }
}

since Framework 4.8 doesn’t allow File-scoped names, so the class should be "inside" the namespace.

But if you are learning, I would suggest don’t use empty blank, syntax could be a bit different, but in learning mode this bit means a lot and you will found examples of code that often doesn’t specify the syntax.

You could also try your code at Fiddle DOT NET https://dotnetfiddle.net/