chore: Add example usage test and restore original build configuration

Co-authored-by: samtrion <[email protected]>

Author: Copilot

Directory.Build.props

@@ -7,13 +7,13 @@
     <PackageReleaseNotes>$(RepositoryUrl)/releases</PackageReleaseNotes>
     <PackageTags>$(PackageTags);codegeneration;sourcegenrator</PackageTags>
     <CopyrightYearStart>2024</CopyrightYearStart>
-    <_DefaultTargetFrameworks>net8.0</_DefaultTargetFrameworks>
+    <_DefaultTargetFrameworks>net8.0;net9.0;net10.0</_DefaultTargetFrameworks>
     <_ProjectTargetFrameworks>netstandard2.0;netstandard2.1;$(_DefaultTargetFrameworks)</_ProjectTargetFrameworks>
     <_TestTargetFrameworks>$(_DefaultTargetFrameworks)</_TestTargetFrameworks>
     <CheckEolTargetFramework>false</CheckEolTargetFramework>
   </PropertyGroup>
   <PropertyGroup>
     <!-- Workaround, until https://github.com/GitTools/GitVersion/pull/4206 is released -->
-    <GitVersionTargetFramework>net8.0</GitVersionTargetFramework>
+    <GitVersionTargetFramework>net9.0</GitVersionTargetFramework>
   </PropertyGroup>
 </Project>

tests/NetEvolve.CodeBuilder.Tests.Unit/CSharpCodeBuilderTests.Scope.cs

@@ -271,4 +271,23 @@ public async Task Scope_Disposal_Should_Be_Safe_To_Call_Multiple_Times()
         var expected = Environment.NewLine + "    test" + Environment.NewLine + "after";
         _ = await Assert.That(builder.ToString()).IsEqualTo(expected);
     }
+
+    [Test]
+    public async Task Scope_Example_Usage_Should_Generate_Proper_Code()
+    {
+        // This test shows the typical usage pattern mentioned in the issue
+        var builder = new CSharpCodeBuilder();
+
+        _ = builder.AppendLine("if (condition)");
+        using (builder.Scope())
+        {
+            _ = builder.AppendLine("return true;");
+        }
+        _ = builder.Append("return false;");
+
+        var expected =
+            "if (condition)" + Environment.NewLine + "    return true;" + Environment.NewLine + "return false;";
+
+        _ = await Assert.That(builder.ToString()).IsEqualTo(expected);
+    }
 }