Add missing files

MasterSlave/Master/SlaveDriver.cs

@@ -0,0 +1,33 @@
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Linq;
+using System.Text;
+using System.Threading;
+using System.Threading.Tasks;
+using ExcelDna.Integration;
+using static ExcelDna.Integration.XlCall;
+
+namespace MasterSlave
+{
+    public static class SlaveDriver
+    {
+        // Passing this as a parameter makes it hard to call from the ribbon...
+        const string path = @"C:\Work\Excel-DNA\Samples\MasterSlave\Slave\bin\Debug\Slave-AddIn.xll";
+        public static void RegisterSlave()
+        {
+            Console.Beep();
+            Console.Beep();
+            Console.Beep();
+            Console.Beep();
+            Excel(xlcMessage, true, $"Loading {path}");
+            Thread.Sleep(1000);
+            ExcelIntegration.RegisterXLL(path);
+        }
+
+        public static void UnregisterSlave()
+        {
+            ExcelIntegration.UnregisterXLL(path);
+        }
+    }
+}

MasterSlave/Master/packages.config

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<packages>
+  <package id="ExcelDna.AddIn" version="0.33.9" targetFramework="net45" />
+  <package id="ExcelDna.Integration" version="0.33.9" targetFramework="net45" />
+</packages>