Fix Binding constructor

Author: Happypig375

CSharpMath.Xaml.Tests/TestAvalonia.cs

@@ -29,7 +29,7 @@ public class TestAvalonia
     protected override BindingMode TwoWay => BindingMode.TwoWay;
     protected override TView ParseFromXaml<TView>(string xaml) => AvaloniaRuntimeXamlLoader.Parse<TView>(xaml);
     protected override IDisposable SetBinding(Control view, AvaloniaProperty property, string viewModelProperty, BindingMode bindingMode) =>
-      view.Bind(property, new Binding(viewModelProperty, bindingMode));
+      view.Bind(property, new Binding(viewModelProperty) { Mode = bindingMode });
     protected override void SetBindingContext(Control view, object viewModel) =>
       view.DataContext = viewModel;
   }