diff --git a/Maui.DataGrid/DataGrid.xaml.cs b/Maui.DataGrid/DataGrid.xaml.cs
index bd1e406..ef4e049 100644
--- a/Maui.DataGrid/DataGrid.xaml.cs
+++ b/Maui.DataGrid/DataGrid.xaml.cs
@@ -212,7 +212,7 @@ private void SortAndPaginate(SortData? sortData = null)
 
             sortData ??= SortedColumnIndex;
 
-            var originalItems = ItemsSource.Cast<object>().ToList();
+            var originalItems = ItemsSource as IList<object> ?? ItemsSource.Cast<object>().ToList();
 
             PageCount = (int)Math.Ceiling(originalItems.Count / (double)PageSize);