fixed #192

src/Shared/HandyControlDemo_Code/DemoHelper.cs

@@ -0,0 +1,25 @@
+using System;
+using System.IO;
+using System.Windows;
+
+public class DemoHelper
+{
+    public static void Main()
+    {
+
+    }
+
+    public static string GetCode(string demoName)
+    {
+        var uri = new Uri($"/HandyControlDemoCode;component/{demoName}", UriKind.Relative);
+        var resourceStream = Application.GetResourceStream(uri);
+        if (resourceStream != null)
+        {
+            using var reader = new StreamReader(resourceStream.Stream);
+            var code = reader.ReadToEnd();
+            return code;
+        }
+
+        return "";
+    }
+}