How to create a global variable in ASP.NET Core Web API application?

Question

How can I create a global variable in an ASP.NET Core Web API application? In ASP.NET MVC, I could do it like:

Application["<variableName>"] = <value>

I tried the same in my web API application, but was unable to find an equivalent for this. I saw some solutions which suggested me to store the data appsettings.json, but since the data I want to store in the global variable is not static, I cannot use that setup. I need to set different data during runtime. How can I do that? Please help me.

Answer 1

somewhere in project

public static class Config{
       public static Dictionary<string,string> Application = new Dictionary<string,string>();
}

elsewhere

Config.Application["froop"] = "noodle";

of course you will have to deal with race conditions, etc