Confirm to delete

src/MainForm.cs

@@ -151,15 +151,25 @@ namespace RDP_Portal {
         }
 
         private void buttonDelete_Click(object sender, EventArgs e) {
+            // show confirm dialog
+            var confirmResult = MessageBox.Show(
+                "Are you sure to delete this profile?",
+                "Confirm",
+                MessageBoxButtons.YesNo);
+
+            // if confirm delete
+            if (confirmResult == DialogResult.Yes) {
                 var selectedItems = (Profile) listBox.SelectedItem;
                 selectedItems.Delete();
                 _config.Profiles.Remove(selectedItems);
                 _config.Save();
+
                 if (_config.Profiles.Count == 0) {
                     AddNewProfile();
                     SelectProfile(true);
                 }
             }
+        }
 
         private void buttonSave_Click(object sender, EventArgs e) {
             var profile = (Profile) listBox.SelectedItem;