Use appropriate framework targets

When configuring .NET projects, always use the correct target framework elements and versions:

1. Use the singular <TargetFramework> element when targeting a single framework: ```xml

2. Use the plural `<TargetFrameworks>` element only when targeting multiple frameworks:
```xml
<TargetFrameworks>netstandard2.0;net6.0</TargetFrameworks>

1. Always prefer Long Term Support (LTS) versions (like .NET 6) over non-LTS versions (like .NET 5) to ensure stability and longer support lifecycles. This reduces the frequency of required updates and provides more reliable runtime environments for production applications.