C# syntax updates

Author: christiannagel

src/Codebreaker.Identity.sln

@@ -0,0 +1,31 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.14.36121.58
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Codebreaker.Identity", "services\identity\Codebreaker.Identity\Codebreaker.Identity.csproj", "{0F0F9423-3793-5157-B688-D616FC508021}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Codebreaker.Identity.Tests", "services\identity\Codebreaker.Identity.Tests\Codebreaker.Identity.Tests.csproj", "{908DAF3F-1A04-E26E-CE74-87B1C27E47AC}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{0F0F9423-3793-5157-B688-D616FC508021}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{0F0F9423-3793-5157-B688-D616FC508021}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{0F0F9423-3793-5157-B688-D616FC508021}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{0F0F9423-3793-5157-B688-D616FC508021}.Release|Any CPU.Build.0 = Release|Any CPU
+		{908DAF3F-1A04-E26E-CE74-87B1C27E47AC}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{908DAF3F-1A04-E26E-CE74-87B1C27E47AC}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{908DAF3F-1A04-E26E-CE74-87B1C27E47AC}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{908DAF3F-1A04-E26E-CE74-87B1C27E47AC}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {5AABC12D-CB55-4156-BFE7-95FDD686A192}
+	EndGlobalSection
+EndGlobal

src/services/identity/Codebreaker.Identity.Tests/AnonymousUserServiceTests.cs

@@ -80,15 +80,10 @@ public void ServiceInitialization_WithNullLogger_ShouldThrow()
     }
 
     // A test wrapper for GraphAnonymousUserService that allows testing without actually using Graph API
-    private class GraphAnonymousUserServiceWrapper : GraphAnonymousUserService
+    private class GraphAnonymousUserServiceWrapper(
+        IOptions<AnonymousUserOptions> options,
+        ILogger<GraphAnonymousUserService> logger) : GraphAnonymousUserService(options, logger)
     {
-        public GraphAnonymousUserServiceWrapper(
-            IOptions<AnonymousUserOptions> options,
-            ILogger<GraphAnonymousUserService> logger)
-            : base(options, logger)
-        {
-            // Constructor only for initialization testing
-        }
 
         // We don't test the actual Graph API methods here
         public new Task<AnonymousUser> CreateAnonUser(string userName) =>

src/services/identity/Codebreaker.Identity/Services/GraphAnonymousUserService.cs

@@ -56,7 +56,7 @@ public async Task<AnonymousUser> CreateAnonUser(string userName)
         try
         {
             // Create the user in Azure AD via Microsoft Graph
-            var newUser = new User
+            User newUser = new()
             {
                 AccountEnabled = true,
                 DisplayName = displayName,

src/services/identity/Codebreaker.Identity/Services/MockAnonymousUserService.cs

@@ -9,7 +9,7 @@ namespace Codebreaker.Identity.Services;
 public class MockAnonymousUserService : IAnonymousUserService
 {
     private readonly ILogger<MockAnonymousUserService> _logger;
-    private readonly List<AnonymousUser> _users = new();
+    private readonly List<AnonymousUser> _users = [];
 
     /// <summary>
     /// Initializes a new instance of the <see cref="MockAnonymousUserService"/> class