add a missing file

oop/notenbewertung/notenbewertung/Testresultat.cs

@@ -0,0 +1,18 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace notenbewertung
+{
+    class Testresultat
+    {
+        public double Note { get; set; }
+        public Testresultat(double d)
+        {
+            this.Note = d;
+        }
+
+    }
+}