[🚀 Feature]: Add .NET 6.0 to dotnet project build targets

Feature and motivation

.NET 6.0 SDK was recently publicly released, so we should consider adding .NET 6 to the list of target frameworks for each dotnet project.

Not much has changed from NET 5 to NET 6 in terms of required source changes, however .NET 6 lists Visual Studio 2022 as a requirement so keep that in mind.

Usage example

I was able to successfully update the following projects and build .NET 6 DLLs from Visual Studio 2022:

• WebDriver
• WebDriver.Support
• WebDriverBackedSelenium

Rough steps on updating project to support .NET 6 (Note VS2022 is required for full .NET 6 support):

1. Install latest .NET 6.0 SDK and latest Visual Studio 2022
2. Edit each project and nuspec file to specify net6.0 where applicable.
3. Edit preprocessor directives in relevant sources to include NET6_0_OR_GREATER (or NET6_0) where applicable or you will encounter an error when building sources that use system drawing methods (like screenshotting)

You may be able to get around installing VS2022, if one were to just perform the above changes and then build with the NET 6 SDK installed, however I have not tried this myself so cannot speak to how this workaround might work.

[jimevans]

Given that the .NET bindings are not moving away from Bazel as the build tool, Bazel will need to support VS 2022 before this can be done properly. As of January 2022, Bazel did not offer that support; I have not been able to get back to inquire as to whether that support has yet been added. Once it is, it will be reasonably easy to add that as a build target to the existing build.

[titusfortner]

I think I got everything else covered with this - d2838e1291032fde9e0da47ad6bb809f03c53deb

I built the solution and tested it in Mac, Win10 & Win11 without issues.