How do I add a C# solution file in JetBrains Rider?

Question

In Rider, if I open a folder that has a single .csproj file in it, how do I add a solution? Is there a way to do it inside Rider, like there is in Visual Studio, without resorting to the command line and closing/re-opening?

Answer 1

Looks like you can do this with Rider 2019.1 now.

Go to File -> New -> gives the option to add a new solution.