If the source collection of the foreach statement is empty, the body of the foreach statement isn’t executed and skipped.
If the foreach statement is applied to null, a NullReferenceException is thrown.
More Information:
https://learn.microsoft.com/en-us/dotnet/csharp/language-reference/statements/iteration-statements
Open a command prompt and enter the version command.
dotnet --version
This should return a version number. If you get something like the message below, .Net Core is not installed.
'dotnet' is not recognized as an internal or external command,
operable program or batch file.You can also issue the info command to get a lot more information about your environment.
dotnet --info
If you want to actually look at the different .Net SDKs which you have installed, they can be found here on a Windows machine:
C:\Program Files\dotnet\sdk