removal of TaskDialog usage...

src/Misc/Msg.cs

@@ -0,0 +1,39 @@
+
+using System;
+using System.Windows.Forms;
+
+public class Msg
+{
+    public static void ShowInfo(object title, object content = null)
+    {
+        Show(title, content, MessageBoxIcon.Information);
+    }
+
+    public static void ShowError(object title, object content = null)
+    {
+        Show(title, content, MessageBoxIcon.Error);
+    }
+
+    public static void ShowWarning(object title, object content = null)
+    {
+        Show(title, content, MessageBoxIcon.Warning);
+    }
+
+    public static DialogResult ShowQuestion(object title, object content = null,
+        MessageBoxButtons buttons = MessageBoxButtons.OKCancel)
+    {
+        return Show(title, content, MessageBoxIcon.Question, buttons);
+    }
+
+    public static void ShowException(Exception exception)
+    {
+        Show(exception, null, MessageBoxIcon.Error);
+    }
+
+    public static DialogResult Show(object title, object content, MessageBoxIcon icon,
+        MessageBoxButtons buttons = MessageBoxButtons.OK)
+    {
+        string msg = (title?.ToString().TrimEx() + "\n\n" + content?.ToString().TrimEx()).Trim();
+        return MessageBox.Show(msg, Application.ProductName, buttons, icon);
+    }
+}