added things

Algorithms/NumberTheory/Simple.cs

@@ -0,0 +1,15 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+
+namespace Algorithms.NumberTheory;
+
+class Simple
+{
+    internal double d;
+
+    public Simple(double d) {
+        this.d = d;
+    }
+}