Fix test

Author: jbevain

Packages/com.unity.ide.visualstudio.tests/Tests/Editor/CSProjectTests.cs

@@ -173,6 +173,7 @@ public void DefaultSyncSettings_WhenSynced_CreatesProjectFileFromDefaultTemplate
 					"    <ProjectTypeGuids>{E097FAD1-6243-4DAD-9C02-E9B9EFC3FFC1};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}</ProjectTypeGuids>",
 					"    <UnityProjectGenerator>Package</UnityProjectGenerator>",
 					$"    <UnityProjectGeneratorVersion>{packageVersion}</UnityProjectGeneratorVersion>",
+					"    <UnityProjectGeneratorStyle>Legacy</UnityProjectGeneratorStyle>",
 					$"    <UnityProjectType>{buildTarget}</UnityProjectType>",
 					$"    <UnityBuildTarget>{EditorUserBuildSettings.activeBuildTarget + ":" + (int)EditorUserBuildSettings.activeBuildTarget}</UnityBuildTarget>",
 					$"    <UnityVersion>{unityVersion}</UnityVersion>",

Packages/com.unity.ide.visualstudio/Editor/ProjectGeneration/ProjectGeneration.cs

@@ -836,7 +836,7 @@ internal void GetProjectHeaderVstuFlavoring(ProjectProperties properties, String
 
 			headerBuilder.Append(@"    <UnityProjectGenerator>Package</UnityProjectGenerator>").Append(k_WindowsNewline);
 			headerBuilder.Append(@"    <UnityProjectGeneratorVersion>").Append(properties.FlavoringPackageVersion).Append(@"</UnityProjectGeneratorVersion>").Append(k_WindowsNewline);
-			headerBuilder.Append($@"    <UnityProjectGeneratorStyle>").Append(StyleName).Append("</UnityProjectGeneratorStyle>").Append(k_WindowsNewline);
+			headerBuilder.Append(@"    <UnityProjectGeneratorStyle>").Append(StyleName).Append("</UnityProjectGeneratorStyle>").Append(k_WindowsNewline);
 			headerBuilder.Append(@"    <UnityProjectType>").Append(properties.FlavoringProjectType).Append(@"</UnityProjectType>").Append(k_WindowsNewline);
 			headerBuilder.Append(@"    <UnityBuildTarget>").Append(properties.FlavoringBuildTarget).Append(@"</UnityBuildTarget>").Append(k_WindowsNewline);
 			headerBuilder.Append(@"    <UnityVersion>").Append(properties.FlavoringUnityVersion).Append(@"</UnityVersion>").Append(k_WindowsNewline);