C# - How to pass arguments from Service Installer to Service?

Question

Problem

I am using C# to make a Service. I want to pass parameters into the OnStart method that were defined when running the installation.

What I have tried

Using the solution found here I am able to pass ServiceName and DisplayName for the service when running the installer, like so; installutil /u /ServiceName=A.Service .\WindowsService1.exe

I am able to access these parameters using something like Context.Parameters.ContainsKey("ServiceName") in the installer, but I cannot access them in the service itself.

I need to be able to pass them from the installer into the service.

Question

How can I pass these parameters through to the service?

Either to the Main method or the OnStart method of the Service.