Add Assembly.TryGetVersionString() extension

PowerKit.Tests/AssemblyExtensionsTests.cs

@@ -0,0 +1,22 @@
+using System.Reflection;
+using FluentAssertions;
+using PowerKit.Extensions;
+using Xunit;
+
+namespace PowerKit.Tests;
+
+public class AssemblyExtensionsTests
+{
+    [Fact]
+    public void TryGetVersionString_Test()
+    {
+        // Arrange
+        var assembly = typeof(AssemblyExtensionsTests).Assembly;
+
+        // Act
+        var version = assembly.TryGetVersionString();
+
+        // Assert
+        version.Should().NotBeNullOrWhiteSpace();
+    }
+}

PowerKit/Extensions/AssemblyExtensions.cs

@@ -0,0 +1,19 @@
+using System.Reflection;
+
+namespace PowerKit.Extensions;
+
+internal static class AssemblyExtensions
+{
+    extension(Assembly assembly)
+    {
+        /// <summary>
+        /// Returns the informational version string of the assembly, falling back to the
+        /// assembly version if the <see cref="AssemblyInformationalVersionAttribute" /> is not set.
+        /// Returns <see langword="null" /> if neither is available.
+        /// </summary>
+        public string? TryGetVersionString() =>
+            assembly
+                .GetCustomAttribute<AssemblyInformationalVersionAttribute>()
+                ?.InformationalVersion ?? assembly.GetName().Version?.ToString();
+    }
+}