diff --git a/Directory.Build.props b/Directory.Build.props
index 4d8ff9e..eeb84d5 100644
--- a/Directory.Build.props
+++ b/Directory.Build.props
@@ -16,7 +16,7 @@
 	<PackageReadmeFile>README.md</PackageReadmeFile>
   </PropertyGroup>
   <PropertyGroup>
-  	<LangVersion>10.0</LangVersion>
+  	<LangVersion>12.0</LangVersion>
   	<ImplicitUsings>true</ImplicitUsings>
   	<Nullable>enable</Nullable>
   </PropertyGroup>
diff --git a/IntelliTect.Multitool.Tests/ClaimsPrincipalExtensionsTests.cs b/IntelliTect.Multitool.Tests/ClaimsPrincipalExtensionsTests.cs
index ddc198c..a6052db 100644
--- a/IntelliTect.Multitool.Tests/ClaimsPrincipalExtensionsTests.cs
+++ b/IntelliTect.Multitool.Tests/ClaimsPrincipalExtensionsTests.cs
@@ -6,8 +6,8 @@ namespace IntelliTect.Multitool.Security.Tests;
 
 public class ClaimsPrincipalExtensionsTests
 {
-    static readonly string[] roles = new[] { "Foo", "Bar" };
-    static readonly string[] singleRole = new[] { "Bar" };
+    static readonly string[] roles = ["Foo", "Bar"];
+    static readonly string[] singleRole = ["Bar"];
 
     [Fact]
     public void GetRoles_WhenClaimsPrincipalNull_Should_Throw()
diff --git a/IntelliTect.Multitool/Extensions/HttpExtensions.cs b/IntelliTect.Multitool/Extensions/HttpExtensions.cs
index ab26a0c..2af2287 100644
--- a/IntelliTect.Multitool/Extensions/HttpExtensions.cs
+++ b/IntelliTect.Multitool/Extensions/HttpExtensions.cs
@@ -50,6 +50,6 @@ public static async Task<bool> ValidateUri(this HttpClient client, Uri uri, Prod
     /// <returns>The result of the call</returns>
     public static async Task<bool> ValidateUri(this HttpClient client, Uri uri, ProductInfoHeaderValue? headerValue, HttpCompletionOption completionOption = HttpCompletionOption.ResponseHeadersRead)
     {
-        return await ValidateUri(client, uri, headerValue is null ? null : new ProductInfoHeaderValue[] { headerValue }, completionOption);
+        return await ValidateUri(client, uri, headerValue is null ? null : [headerValue], completionOption);
     }
 }
diff --git a/IntelliTect.Multitool/ReleaseDateAttribute.cs b/IntelliTect.Multitool/ReleaseDateAttribute.cs
index 4366bf2..7356c64 100644
--- a/IntelliTect.Multitool/ReleaseDateAttribute.cs
+++ b/IntelliTect.Multitool/ReleaseDateAttribute.cs
@@ -4,24 +4,16 @@
 namespace IntelliTect.Multitool;
 
 /// <summary>
-/// The release date assembly attribute
+/// The release date assembly attribute with a constructor that takes in a DateTime string
 /// </summary>
+/// <param name="utcDateString">A DateTime 'O' (round-trip date/time) format string</param>
 [AttributeUsage(AttributeTargets.Assembly)]
-public class ReleaseDateAttribute : Attribute
+public class ReleaseDateAttribute(string utcDateString) : Attribute
 {
-    /// <summary> 
-    /// Constructor that takes in a DateTime string
-    /// </summary>
-    /// <param name="utcDateString">A DateTime 'O' (round-trip date/time) format string</param>
-    public ReleaseDateAttribute(string utcDateString)
-    {
-        ReleaseDate = DateTime.ParseExact(utcDateString, "O", CultureInfo.InvariantCulture, DateTimeStyles.RoundtripKind);
-    }
-
     /// <summary>
     /// The date the assembly was built
     /// </summary>
-    public DateTime ReleaseDate { get; }
+    public DateTime ReleaseDate { get; } = DateTime.ParseExact(utcDateString, "O", CultureInfo.InvariantCulture, DateTimeStyles.RoundtripKind);
 
     /// <summary>
     /// Method to obtain the release date from the assembly attribute
@@ -34,4 +26,4 @@ public ReleaseDateAttribute(string utcDateString)
         return attribute?.Length >= 1 ? ((ReleaseDateAttribute)attribute[0]).ReleaseDate : null;
     }
 
-}
\ No newline at end of file
+}