Implement IReadOnlyList for State

csharp/Lib/Units/State.cs

@@ -1,6 +1,8 @@
+using System.Collections;
+
 namespace InnovEnergy.Lib.Units;
 
-public readonly struct State
+public readonly struct State : IReadOnlyList<String>
 {
     public IReadOnlyList<String> Values { get; }
     
@@ -25,5 +27,11 @@ public readonly struct State
     
     public static State operator |(State left, State right) => new(left, right);
 
+    public IEnumerator<String> GetEnumerator() => Values.GetEnumerator();
+
     public override String ToString() => String.Join("; ", Values);
+    IEnumerator IEnumerable.GetEnumerator() => GetEnumerator();
+
+    public Int32 Count => Values.Count;
+    public String this[Int32 index] => Values[index];
 }