Dictionary<string, List<MyType>> myDico = GetDictionary();
List<MyType> items = ???

List<MyType> items = new List<MyType>(myDico.values)

var items = myDico.SelectMany (d => d.Value).ToList();

List<MyType> allItems = myDico.Values.SelectMany(c => c).ToList();

List<MyType> items = new List<MyType>();
    items.AddRange(myDico.values);

var values = myDico.Values.ToList();

var MyList = new List<MyType>(MyDico.Values);

List<MyType> allItems = myDico.Values.Where(x => x != null).SelectMany(x => x).ToList();

List<MyType> items = new List<MyType>()
foreach(var value in myDico.Values)
    items.AddRange(value);

Dictionary<string, MyType> myDico = GetDictionary();
List<MyType> items = new List<MyType>(myDico.Values);

List<String> objListColor = new List<String>() { "Red", "Blue", "Green", "Yellow" };
        List<String> objListDirection = new List<String>() { "East", "West", "North", "South" };

        Dictionary<String, List<String>> objDicRes = new Dictionary<String, List<String>>();
        objDicRes.Add("Color", objListColor);
        objDicRes.Add("Direction", objListDirection);

MyType[] Temp = new MyType[myDico.Count];
myDico.Values.CopyTo(Temp, 0);
List<MyType> items = Temp.ToList();

Dictionary<string, MyType> myDico = GetDictionary();

var items = myDico.Select(d=> d.Value).ToList();