Make WindowNotificationManager(TopLevel) ctor nullable as it was before

3 years ago · 0f85a4603d
1 changed files with 5 additions and 2 deletions
--- a/src/Avalonia.Controls/Notifications/WindowNotificationManager.cs
+++ b/src/Avalonia.Controls/Notifications/WindowNotificationManager.cs
@ -54,9 +54,12 @@ namespace Avalonia.Controls.Notifications
        /// Initializes a new instance of the <see cref="WindowNotificationManager"/> class.
        /// </summary>
        /// <param name="host">The TopLevel that will host the control.</param>
-        public WindowNotificationManager(TopLevel host) : this()
+        public WindowNotificationManager(TopLevel? host) : this()
        {
-            InstallFromTopLevel(host);
+            if (host is not null)
+            {
+                InstallFromTopLevel(host);
+            }
        }

        /// <summary>