VerifyTests
diff --git a/‎src/DiffEngineTray/Settings/OptionsFormLauncher.cs‎
Lines changed: 5 additions & 7 deletions b/‎src/DiffEngineTray/Settings/OptionsFormLauncher.cs‎
Lines changed: 5 additions & 7 deletions
@@ -6,7 +6,11 @@
 static class OptionsFormLauncher
 {
  static OptionsForm? instance;
- static EventHandler formOnClosed = Form_Closed;
+ static EventHandler formOnClosed = (_, _) =>
+ {
+ instance!.Closed -= formOnClosed;
+ instance = null;
+ };
 
  public static async Task Launch(KeyRegister keyRegister, Tracker tracker)
  {
@@ -23,12 +27,6 @@ public static async Task Launch(KeyRegister keyRegister, Tracker tracker)
  form.ShowDialog();
  }
 
- static void Form_Closed(object? sender, EventArgs e)
- {
- instance!.Closed -= formOnClosed;
- instance = null;
- }
-
  static async Task<IReadOnlyList<string>> Save(KeyRegister keyRegister, Tracker tracker, Settings settings)
  {
  if (!settings.IsValidate(out var errors))
Original file line number	Diff line number	Diff line change
`@@ -6,7 +6,11 @@`
`6`	`6`	`static class OptionsFormLauncher`
`7`	`7`	`{`
`8`	`8`	`static OptionsForm? instance;`
`9`		`- static EventHandler formOnClosed = Form_Closed;`
	`9`	`+ static EventHandler formOnClosed = (_, _) =>`
	`10`	`+ {`
	`11`	`+ instance!.Closed -= formOnClosed;`
	`12`	`+ instance = null;`
	`13`	`+ };`
`10`	`14`
`11`	`15`	`public static async Task Launch(KeyRegister keyRegister, Tracker tracker)`
`12`	`16`	`{`
`@@ -23,12 +27,6 @@ public static async Task Launch(KeyRegister keyRegister, Tracker tracker)`
`23`	`27`	`form.ShowDialog();`
`24`	`28`	`}`
`25`	`29`
`26`		`- static void Form_Closed(object? sender, EventArgs e)`
`27`		`- {`
`28`		`- instance!.Closed -= formOnClosed;`
`29`		`- instance = null;`
`30`		`- }`
`31`		`-`
`32`	`30`	`static async Task<IReadOnlyList<string>> Save(KeyRegister keyRegister, Tracker tracker, Settings settings)`
`33`	`31`	`{`
`34`	`32`	`if (!settings.IsValidate(out var errors))`