SharePoint, we have a problem

I am trying to link my C# code to my Microsoft List (aka, SharePoint List). The learning path has included this suggestion:

It turns out I do, in fact, have Microsoft.SharePoint.Client.Runtime.dll and Microsoft.SharePoint.Client.dll on local computer

In my C# code, I have added these two DLL's as a Reference. Then I typed in the "using" code as described. But when I tried to use this in my Visual Studio 2022 and I got this error:

Can you offer a suggestion? I know you can. I believe in you. Please help.