Code to add different types of datatype in ArrayList and then to get specific types of datatypes

System.Collections.ArrayList AllType = new System.Collections.ArrayList();

        // Add numbers to the list
        AllType.Add(7);
        AllType.Add(21);

        // Add strings to the list
        AllType.Add("Hello");
        AllType.Add("This is going to be a problem");
        //for retrieving string value
        ArrayList stringArray = new ArrayList();
        foreach (string s in AllType.OfType<string>())
        {
            stringArray.Add(s);
        }
        //for retrieving int value
        ArrayList intArray = new ArrayList();
        foreach (int i in AllType.OfType<int>())
        {
            intArray.Add(i);
        }
                             OR
string[] stringList = AllType.OfType<string>().ToArray();
                Int32[] intList = AllType.OfType<Int32>().ToArray();