diff --git a/csharp/TheatricalPlayersRefactoringKata.Tests/StatementPrinterTests.cs b/csharp/TheatricalPlayersRefactoringKata.Tests/StatementPrinterTests.cs
index 1a2bf15..9b10a64 100644
--- a/csharp/TheatricalPlayersRefactoringKata.Tests/StatementPrinterTests.cs
+++ b/csharp/TheatricalPlayersRefactoringKata.Tests/StatementPrinterTests.cs
@@ -11,18 +11,18 @@ namespace TheatricalPlayersRefactoringKata.Tests
     {
         [Test]
         [UseReporter(typeof(DiffReporter))]
-        public void test_statement_plain_text_example()
+        public void Test_statement_plain_text_example()
         {
             var plays = new Dictionary<string, Play>();
             plays.Add("hamlet", new Play("Hamlet", "tragedy"));
             plays.Add("as-like", new Play("As You Like It", "comedy"));
             plays.Add("othello", new Play("Othello", "tragedy"));
 
-            Invoice invoice = new Invoice("BigCo", new List<Performance>{new Performance("hamlet", 55),
+            var invoice = new Invoice("BigCo", new List<Performance>{new Performance("hamlet", 55),
                 new Performance("as-like", 35),
                 new Performance("othello", 40)});
             
-            StatementPrinter statementPrinter = new StatementPrinter();
+            var statementPrinter = new StatementPrinter();
             var result = statementPrinter.Print(invoice, plays);
             
             Approvals.Verify(result);
@@ -30,18 +30,18 @@ namespace TheatricalPlayersRefactoringKata.Tests
 
         [Test]
         [UseReporter(typeof(DiffReporter))]
-        public void test_statement_html_example()
+        public void Test_statement_html_example()
         {
             var plays = new Dictionary<string, Play>();
             plays.Add("hamlet", new Play("Hamlet", "tragedy"));
             plays.Add("as-like", new Play("As You Like It", "comedy"));
             plays.Add("othello", new Play("Othello", "tragedy"));
 
-            Invoice invoice = new Invoice("BigCo", new List<Performance>{new Performance("hamlet", 55),
+            var invoice = new Invoice("BigCo", new List<Performance>{new Performance("hamlet", 55),
                 new Performance("as-like", 35),
                 new Performance("othello", 40)});
             
-            StatementPrinter statementPrinter = new StatementPrinter();
+            var statementPrinter = new StatementPrinter();
             
             // Not implemented yet
             // var result = statementPrinter.PrintAsHtml(invoice, plays);
@@ -50,16 +50,16 @@ namespace TheatricalPlayersRefactoringKata.Tests
 
         [Test]
         [UseReporter(typeof(DiffReporter))]
-        public void test_statement_with_new_play_types()
+        public void Test_statement_with_new_play_types()
         {
             var plays = new Dictionary<string, Play>();
             plays.Add("henry-v", new Play("Henry V", "history"));
             plays.Add("as-like", new Play("As You Like It", "pastoral"));
 
-            Invoice invoice = new Invoice("BigCoII", new List<Performance>{new Performance("henry-v", 53),
+            var invoice = new Invoice("BigCoII", new List<Performance>{new Performance("henry-v", 53),
                 new Performance("as-like", 55)});
             
-            StatementPrinter statementPrinter = new StatementPrinter();
+            var statementPrinter = new StatementPrinter();
 
             Assert.Throws<Exception>(() => statementPrinter.Print(invoice, plays));
         }
diff --git a/csharp/TheatricalPlayersRefactoringKata.Tests/TheatricalPlayersRefactoringKata.Tests.csproj b/csharp/TheatricalPlayersRefactoringKata.Tests/TheatricalPlayersRefactoringKata.Tests.csproj
index 916cf3a..63b09b2 100644
--- a/csharp/TheatricalPlayersRefactoringKata.Tests/TheatricalPlayersRefactoringKata.Tests.csproj
+++ b/csharp/TheatricalPlayersRefactoringKata.Tests/TheatricalPlayersRefactoringKata.Tests.csproj
@@ -1,19 +1,20 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net5.0</TargetFramework>
+    <TargetFramework>net6.0</TargetFramework>
     <IsPackable>false</IsPackable>
+    <LangVersion>10</LangVersion>
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="ApprovalTests" Version="4.0.0" />
-    <PackageReference Include="FakeItEasy" Version="6.2.1" />
-    <PackageReference Include="FluentAssertions" Version="5.10.3" />
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.8.3" />
+    <PackageReference Include="ApprovalTests" Version="5.7.2" />
+    <PackageReference Include="FakeItEasy" Version="7.3.1" />
+    <PackageReference Include="FluentAssertions" Version="6.5.1" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.1.0" />
     <PackageReference Include="NBuilder" Version="6.1.0" />
-    <PackageReference Include="Newtonsoft.Json" Version="12.0.3" />
-    <PackageReference Include="NUnit" Version="3.13.1" />
-    <PackageReference Include="NUnit3TestAdapter" Version="3.17.0" />
+    <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
+    <PackageReference Include="NUnit" Version="3.13.3" />
+    <PackageReference Include="NUnit3TestAdapter" Version="4.2.1" />
   </ItemGroup>
 
   <ItemGroup>
diff --git a/csharp/TheatricalPlayersRefactoringKata/StatementPrinter.cs b/csharp/TheatricalPlayersRefactoringKata/StatementPrinter.cs
index 5dc980f..16e3d0b 100644
--- a/csharp/TheatricalPlayersRefactoringKata/StatementPrinter.cs
+++ b/csharp/TheatricalPlayersRefactoringKata/StatementPrinter.cs
@@ -41,11 +41,11 @@ namespace TheatricalPlayersRefactoringKata
                 if ("comedy" == play.Type) volumeCredits += (int)Math.Floor((decimal)perf.Audience / 5);
 
                 // print line for this order
-                result += String.Format(cultureInfo, "  {0}: {1:C} ({2} seats)\n", play.Name, Convert.ToDecimal(thisAmount / 100), perf.Audience);
+                result += string.Format(cultureInfo, "  {0}: {1:C} ({2} seats)\n", play.Name, Convert.ToDecimal(thisAmount / 100), perf.Audience);
                 totalAmount += thisAmount;
             }
-            result += String.Format(cultureInfo, "Amount owed is {0:C}\n", Convert.ToDecimal(totalAmount / 100));
-            result += String.Format("You earned {0} credits\n", volumeCredits);
+            result += string.Format(cultureInfo, "Amount owed is {0:C}\n", Convert.ToDecimal(totalAmount / 100));
+            result += string.Format("You earned {0} credits\n", volumeCredits);
             return result;
         }
     }
diff --git a/csharp/TheatricalPlayersRefactoringKata/TheatricalPlayersRefactoringKata.csproj b/csharp/TheatricalPlayersRefactoringKata/TheatricalPlayersRefactoringKata.csproj
index 1601b0f..92ba13d 100644
--- a/csharp/TheatricalPlayersRefactoringKata/TheatricalPlayersRefactoringKata.csproj
+++ b/csharp/TheatricalPlayersRefactoringKata/TheatricalPlayersRefactoringKata.csproj
@@ -1,8 +1,9 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net5.0</TargetFramework>
+    <TargetFramework>net6.0</TargetFramework>
     <IsPackable>false</IsPackable>
+    <LangVersion>10</LangVersion>
   </PropertyGroup>
 
 </Project>