From e3bfb4f5980321273738c89a8a7bae5be957dfa9 Mon Sep 17 00:00:00 2001
From: Deadpikle <Deadpikle@users.noreply.github.com>
Date: Sun, 16 May 2021 12:39:47 -0400
Subject: [PATCH] DataGrid SelectedIndex & SelectedItem -> TwoWay

Default `DataGrid` `SelectedIndex` and `SelectedItem` binding mode to `TwoWay`.
---
 src/Avalonia.Controls.DataGrid/DataGrid.cs | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/Avalonia.Controls.DataGrid/DataGrid.cs b/src/Avalonia.Controls.DataGrid/DataGrid.cs
index a070a1b9d7..1b4632d368 100644
--- a/src/Avalonia.Controls.DataGrid/DataGrid.cs
+++ b/src/Avalonia.Controls.DataGrid/DataGrid.cs
@@ -535,7 +535,8 @@ namespace Avalonia.Controls
             AvaloniaProperty.RegisterDirect<DataGrid, int>(
                 nameof(SelectedIndex),
                 o => o.SelectedIndex,
-                (o, v) => o.SelectedIndex = v);
+                (o, v) => o.SelectedIndex = v,
+                defaultBindingMode: BindingMode.TwoWay);
 
         /// <summary>
         /// Gets or sets the index of the current selection.
@@ -553,7 +554,8 @@ namespace Avalonia.Controls
             AvaloniaProperty.RegisterDirect<DataGrid, object>(
                 nameof(SelectedItem),
                 o => o.SelectedItem,
-                (o, v) => o.SelectedItem = v);
+                (o, v) => o.SelectedItem = v,
+                defaultBindingMode: BindingMode.TwoWay);
 
         /// <summary>
         /// Gets or sets the data item corresponding to the selected row.