C# Interactive 6↑↓ ) Dictionary(ObjectShap, string) Dic new Dictionary(ObjectShap, string)O Dic. Add(C, First) Dic. Add(R, Second") 〉 string s; if (Dic. TryGetValue(C, out s)Console. WriteLine(s ToString First )if (Dic. TryGetValue(C3, out s))Console. WriteLine(s ToStringO First 已添加了具有相同键的项。 System ThrowHelper. ThrowArgument Exception(System. ExceptionResource) Dictionary (TKey, TValue). Insert (TKey, TValue, bool) Dictionary (TKey, Tvalue). Add (TKey, Tvalue)