feat: Implement Package.Current.Id.Version for Skia and WASM platforms

Co-authored-by: MartinZikmund <1075116+MartinZikmund@users.noreply.github.com>

Author: Copilot

src/Uno.UI.RuntimeTests/Tests/Windows_ApplicationModel/Given_PackageId.cs

@@ -1,4 +1,4 @@
-#if __APPLE_UIKIT__ || __ANDROID__
+#if __APPLE_UIKIT__ || __ANDROID__ || __SKIA__ || __WASM__
 
 using System;
 using Microsoft.VisualStudio.TestTools.UnitTesting;
@@ -9,6 +9,7 @@ namespace Uno.UI.RuntimeTests.Tests.Windows_ApplicationModel
 	[TestClass]
 	public class Given_PackageId
 	{
+#if __APPLE_UIKIT__ || __ANDROID__
 		[TestMethod]
 		public void When_FamilyNameQueried()
 		{
@@ -29,6 +30,7 @@ public void When_NameQueried()
 			var SUT = Package.Current.Id;
 			Assert.IsNotNull(SUT.Name);
 		}
+#endif
 
 		[TestMethod]
 		public void When_VersionQueried()
@@ -43,6 +45,24 @@ public void When_VersionQueried()
 				Assert.Fail("Expected no exception, but got: " + ex.Message);
 			}
 		}
+
+#if __SKIA__ || __WASM__
+		[TestMethod]
+		public void When_VersionQueried_ReturnsValidVersion()
+		{
+			var SUT = Package.Current.Id;
+			var version = SUT.Version;
+
+			// The version should have been populated from AssemblyInformationalVersionAttribute
+			// At minimum, we expect the Major version to be set (not just all zeros)
+			// unless the app explicitly sets version 0.0.0.0
+			// This test verifies that the Version property can be accessed without exception
+			Assert.IsTrue(version.Major >= 0);
+			Assert.IsTrue(version.Minor >= 0);
+			Assert.IsTrue(version.Build >= 0);
+			Assert.IsTrue(version.Revision >= 0);
+		}
+#endif
 	}
 }
 #endif

src/Uno.UWP/ApplicationModel/PackageId.crossruntime.cs

@@ -1,10 +1,51 @@
-namespace Windows.ApplicationModel;
+using System;
+using System.Reflection;
+using SystemVersion = global::System.Version;
+
+namespace Windows.ApplicationModel;
 
 public sealed partial class PackageId
 {
 	public string Name { get; internal set; } = "";
 
-	public PackageVersion Version { get; internal set; }
+	public PackageVersion Version { get; internal set; } = GetEntryAssemblyVersion();
 
 	public string Publisher { get; internal set; } = "";
+
+	private static PackageVersion GetEntryAssemblyVersion()
+	{
+		var assembly = Assembly.GetEntryAssembly();
+		if (assembly is not null)
+		{
+			// Try to get the AssemblyInformationalVersionAttribute first
+			// This corresponds to ApplicationDisplayVersion in MSBuild
+			var informationalVersionAttribute = assembly.GetCustomAttribute<AssemblyInformationalVersionAttribute>();
+			if (informationalVersionAttribute is not null)
+			{
+				var versionString = informationalVersionAttribute.InformationalVersion;
+				// AssemblyInformationalVersion may contain additional metadata (e.g., "+commitHash")
+				// Extract only the version part
+				var plusIndex = versionString.IndexOf('+');
+				if (plusIndex >= 0)
+				{
+					versionString = versionString.Substring(0, plusIndex);
+				}
+
+				if (SystemVersion.TryParse(versionString, out var version))
+				{
+					return new PackageVersion(version);
+				}
+			}
+
+			// Fallback to AssemblyVersion
+			var assemblyVersion = assembly.GetName().Version;
+			if (assemblyVersion is not null)
+			{
+				return new PackageVersion(assemblyVersion);
+			}
+		}
+
+		// Return default version if nothing is found
+		return new PackageVersion();
+	}
 }