dictionary in unity code example

Example 1: unity list

GameObject Obj;
List<GameObject> Objects = new List<GameObject>();

Objects.Add(Obj);

Example 2: dictionary in c# unity

public class ScriptA : MonoBehaviour{
    public Dictionary<string, GameObject> dictio = new Dictionary<string, GameObject>();
}

Example 3: Dictionaries in unity

Dictionary<keyClass,valueClass> dictionaryName;
dictionaryName = new Dictionary<keyClass,valueClass>();