ApplicationItems.cs

using System.Collections.Generic;

namespace ADL.TechPubs
{
    public interface IApplicationItems : IDictionary<string, object>
    {
        bool Exists(string key);
        object Get(string key);
        T Get<T>(string key) where T : class;
    }
    
    public class ApplicationItems : Dictionary<string, object>, IApplicationItems
    {
        public ApplicationItems()
        {
            
        }

        public bool Exists(string key)
        {
            return ContainsKey(key) && this[key] != null;
        }

        public object Get(string key)
        {
            return Exists(key) ? this[key] : null;
        }

        public T Get<T>(string key) where T : class
        {
            return Get(key) as T;
        }
    }
}