diff --git a/TGControlPanel/ControlPanel/ControlPanel.cs b/TGControlPanel/ControlPanel/ControlPanel.cs
index 7a7ead308e..015bfccae7 100644
--- a/TGControlPanel/ControlPanel/ControlPanel.cs
+++ b/TGControlPanel/ControlPanel/ControlPanel.cs
@@ -10,7 +10,7 @@ namespace TGControlPanel
 	/// <summary>
 	/// The main <see cref="ControlPanel"/> form
 	/// </summary>
-	partial class ControlPanel : CountedForm
+	sealed partial class ControlPanel : CountedForm
 	{
 		/// <summary>
 		/// List of instances being used by open control panels
diff --git a/TGControlPanel/CountedForm.cs b/TGControlPanel/CountedForm.cs
index 064c2f9b23..9b442e756e 100644
--- a/TGControlPanel/CountedForm.cs
+++ b/TGControlPanel/CountedForm.cs
@@ -5,7 +5,7 @@ namespace TGControlPanel
 	/// <summary>
 	/// Calls <see cref="Application.Exit()"/> when all <see cref="CountedForm"/>s are <see cref="Form.Close"/>d
 	/// </summary>
-	class CountedForm : Form
+	abstract class CountedForm : Form
 	{
 		/// <summary>
 		/// The current number of active <see cref="CountedForm"/>s
diff --git a/TGControlPanel/InstanceSelector.cs b/TGControlPanel/InstanceSelector.cs
index 82a92efc08..315868f3cc 100644
--- a/TGControlPanel/InstanceSelector.cs
+++ b/TGControlPanel/InstanceSelector.cs
@@ -10,7 +10,7 @@ namespace TGControlPanel
 	/// <summary>
 	/// Form used for managing <see cref="ITGSService"/> <see cref="ITGInstance"/> manipulation functions
 	/// </summary>
-	partial class InstanceSelector : CountedForm
+	sealed partial class InstanceSelector : CountedForm
 	{
 		/// <summary>
 		/// The <see cref="IInterface"/> we build instance connections from
@@ -234,7 +234,7 @@ namespace TGControlPanel
 		/// </summary>
 		/// <param name="sender">The sender of the event</param>
 		/// <param name="e">The <see cref="EventArgs"/></param>
-		private void ConnectButton_Click(object sender, EventArgs e)
+		void ConnectButton_Click(object sender, EventArgs e)
 		{
 			TryConnectToIndexInstance(InstanceListBox.SelectedIndex);
 		}
diff --git a/TGControlPanel/Login.cs b/TGControlPanel/Login.cs
index 1a63abd79c..364746a652 100644
--- a/TGControlPanel/Login.cs
+++ b/TGControlPanel/Login.cs
@@ -4,7 +4,7 @@ using TGServiceInterface;
 
 namespace TGControlPanel
 {
-	partial class Login : CountedForm
+	sealed partial class Login : CountedForm
 	{
 		/// <summary>
 		/// Create a <see cref="Login"/> form