fixes: MenuFlyout Possible null reference argument for parameter

4 years ago · a828e5b4f5
1 changed files with 5 additions and 1 deletions
--- a/src/Avalonia.Controls/Flyouts/FlyoutBase.cs
+++ b/src/Avalonia.Controls/Flyouts/FlyoutBase.cs
@ -562,8 +562,12 @@ namespace Avalonia.Controls.Primitives
            return eventArgs.Cancel;
        }

-        internal static void SetPresenterClasses(IControl presenter, Classes classes)
+        internal static void SetPresenterClasses(IControl? presenter, Classes classes)
        {
+            if(presenter is null)
+            {
+                return;
+            }
            //Remove any classes no longer in use, ignoring pseudo classes
            for (int i = presenter.Classes.Count - 1; i >= 0; i--)
            {