Added PersistEventArgs

Toolkit.Foundation/Persist.cs

@@ -0,0 +1,8 @@
+namespace Toolkit.Foundation;
+
+public class Persist
+{
+    public static PersistEventArgs<TSender> As<TSender>(TSender sender) => new(sender);
+
+    public static PersistEventArgs<TSender> As<TSender>() where TSender : new() => new(new TSender());
+}

Toolkit.Foundation/PersistEventArgs.cs

@@ -0,0 +1,3 @@
+namespace Toolkit.Foundation;
+
+public record PersistEventArgs<TSender>(TSender? Sender = default);