Update for 22-02-22 15:45

tech/interface.wiki

@@ -35,3 +35,39 @@ Something that is IEnumerable can be used with an enumerator object. This
 allows some object to work with LINQ queries. IEnumerable also requires
 `IEnumerator<T>` to be defined. `IEnumerator<T>` also needs
 [[#System.IDisposable]] to be implimented.
+
+{{{
+public class FooEnumerable : IEnumerable<string>
+{
+    private string _data;
+    //must impliment
+    public IEnumerator<string> GetEnumerator()
+    {
+        return new FooEnumerator(_data);
+    }
+
+    //must impliment
+    private IEnumerator GetEnumerator1()
+    {
+        return this.GetEnumerator();
+    }
+    //now override the IEnumerator one
+    IEnumerator IEnumerable.GetEnumerator()
+    {
+        return GetEnumerator1();
+    }
+}
+
+public class FooEnumerator : IEnumerator<string>
+{
+    //required
+    public string Current
+    {
+        get
+        {
+            return "some val";
+        }
+    }
+    
+}
+  }}}