How can I create a global object that is accessible in all the MVC & WEB API after it start and load information from file

Question

I have a class that have a dictionaries that isbeing being load from local XML from App_Data. Where should I add that class to make it global and visible to all the controller in my application? I just one that the behave like a singleton. If a good option to add that in global.asax

Class example

  public class OptionsNames
        {
            private Dictionary<int, string> names;

            public OptionsNames()
            {

                names = new Dictionary<int, string>();

                names= LoadOptionsFromXML();

            }

            public string GetNameById(int id)
            {
                if (names.ContainsKey(id))
                     return names[id];

                return string.Empty;
            }
        }

Answer 1

It sounds like you just want a static object:

public static class OptionsNames
{
    private static Dictionary<int, string> names;

    static OptionsNames()
    {
        names = new Dictionary<int, string>();
        names = LoadOptionsFromXML();
    }

    public static string GetNameById(int id)
    {
        if (names.ContainsKey(id))
             return names[id];
        return string.Empty;
    }

    // other class members
}

It doesn't really matter where the static class is located, it can be referenced from anywhere. Just make sure it's located in an intuitive location/namespace.

Consuming code would simply invoke it directly without having to create an instance:

var name = OptionsNames.GetNameById(someIdValue);