GH-491: Fix version parsing

Samples/Samples/View/DeviceInfoPage.xaml

@@ -17,6 +17,7 @@
                 <Label Text="{Binding Model, StringFormat='Model: {0}'}" />
                 <Label Text="{Binding Manufacturer, StringFormat='Manufacturer: {0}'}" />
                 <Label Text="{Binding Name, StringFormat='Device Name: {0}'}" />
+                <Label Text="{Binding VersionString, StringFormat='Version: {0}'}" />
                 <Label Text="{Binding Version, StringFormat='Version: {0}'}" />
                 <Label Text="{Binding Platform, StringFormat='Platform: {0}'}" />
                 <Label Text="{Binding Idiom, StringFormat='Idiom: {0}'}" />

Samples/Samples/ViewModel/DeviceInfoViewModel.cs

@@ -12,7 +12,9 @@ public class DeviceInfoViewModel : BaseViewModel
 
         public string Name => DeviceInfo.Name;
 
-        public string Version => DeviceInfo.VersionString;
+        public string VersionString => DeviceInfo.VersionString;
+
+        public string Version => DeviceInfo.Version.ToString();
 
         public string Platform => DeviceInfo.Platform;
 

Tests/Utils_Tests.cs

@@ -0,0 +1,19 @@
+using Xamarin.Essentials;
+using Xunit;
+
+namespace Tests
+{
+    public class Utils_Tests
+    {
+        [Theory]
+        [InlineData("9", "9.0", 9, 0)]
+        [InlineData("9.0", "9.0", 9, 0)]
+        public void ParseVersion(string input, string expected, int major, int minor)
+        {
+            var version = Utils.ParseVersion(input);
+            Assert.Equal(expected, version.ToString());
+            Assert.Equal(major, version.Major);
+            Assert.Equal(minor, version.Minor);
+        }
+    }
+}

Xamarin.Essentials/Types/Shared/Utils.shared.cs

@@ -14,6 +14,9 @@ internal static Version ParseVersion(string version)
             if (Version.TryParse(version, out var number))
                 return number;
 
+            if (int.TryParse(version, out var major))
+                return new Version(major, 0);
+
             return new Version(0, 0);
         }