fix: add InvariantCulture for DateTimeOffset.Parse

Microsoft.Toolkit.Uwp.SampleApp/Data/DataGridDataSource.cs

@@ -5,6 +5,7 @@
 using System;
 using System.Collections.Generic;
 using System.Collections.ObjectModel;
+using System.Globalization;
 using System.IO;
 using System.Linq;
 using System.Text;
@@ -30,6 +31,7 @@ namespace Microsoft.Toolkit.Uwp.SampleApp.Data
             StorageFile file = await StorageFile.GetFileFromApplicationUriAsync(uri);
             IRandomAccessStreamWithContentType randomStream = await file.OpenReadAsync();
             _items = new ObservableCollection<DataGridDataItem>();
+            IFormatProvider provider = CultureInfo.InvariantCulture.DateTimeFormat;
 
             using (StreamReader sr = new StreamReader(randomStream.AsStreamForRead()))
             {
@@ -48,7 +50,7 @@ namespace Microsoft.Toolkit.Uwp.SampleApp.Data
                             Coordinates = values[4],
                             Prominence = uint.Parse(values[5]),
                             Parent_mountain = values[6],
-                            First_ascent = DateTimeOffset.Parse(values[7]),
+                            First_ascent = DateTimeOffset.Parse(values[7], provider),
                             Ascents = values[8],
                         });
                 }