Generate sealed class for windows runtime library compatibility

vs2017/VSPackage.Tests/CSharpCodeGeneratorTests.cs

@@ -32,7 +32,7 @@ namespace ChristianHelle.DeveloperTools.CodeGenerators.Resw.CustomTool.Tests
         [TestMethod]
         public void GeneratedCodeIsAPublicClass()
         {
-            Assert.IsTrue(actual.Contains("public partial class"));
+            Assert.IsTrue(actual.Contains("public sealed partial class"));
         }
 
         [TestMethod]

vs2017/VSPackage.Tests/CSharpCodeGeneratorTestsInternal.cs

@@ -33,7 +33,7 @@ namespace ChristianHelle.DeveloperTools.CodeGenerators.Resw.CustomTool.Tests
         [TestMethod]
         public void GeneratedCodeIsAnInternalClass()
         {
-            Assert.IsTrue(actual.Contains("internal partial class"));
+            Assert.IsTrue(actual.Contains("internal sealed partial class"));
         }
 
         [TestMethod]

vs2017/VSPackage.Tests/VisualBasicCodeGeneratorInternalTests.cs

@@ -34,7 +34,7 @@ namespace ChristianHelle.DeveloperTools.CodeGenerators.Resw.CustomTool.Tests
         [TestMethod]
         public void GeneratedCodeIsFriendClass()
         {
-            Assert.IsTrue(actual.Contains("Partial Friend Class"));
+            Assert.IsTrue(actual.Contains("Partial Friend NotInheritable Class"));
         }
 
         [TestMethod]

vs2017/VSPackage/CustomTool/CodeDomCodeGenerator.cs

@@ -57,7 +57,8 @@ namespace ChristianHelle.DeveloperTools.CodeGenerators.Resw.VSPackage.CustomTool
             {
                 IsClass = true,
                 IsPartial = true, 
-                TypeAttributes = classAccessibility.HasValue ? classAccessibility.Value : TypeAttributes.Public
+                TypeAttributes = TypeAttributes.Sealed | (classAccessibility ?? TypeAttributes.Public),
+                Attributes = MemberAttributes.Public | MemberAttributes.Static | MemberAttributes.Final
             };
 
             const string resourceLoaderType = "ResourceLoader";