Session.WriteFromDictionary C# (CSharp) Method

            public object WriteFromDictionary(string key, object value)
            {
                IDictionary dictionary = (ReadFromContext("Dictionary") as IDictionary);
                
                if(dictionary == null)
                     WriteToContext("Dictionary", new Dictionary<string, string>())
    
                dictionary = (ReadFromContext("Dictionary") as IDictionary);
    
                if (dictionary.ContainsKey(key))
                {
                   dictionary[key] = value;
                }
                else
                {
                   dictionary.Add(//add new keyvaluepair.);
                }
            }