Added *.slnx with Xml conditions to OperationConfigDefault. (#8863)

* Added *.slnx with Xml conditions to OperationConfigDefault.

* Trying to fix whitespace problems

* Whitespace fix using another editor

Author: karl-sjogren

src/Microsoft.TemplateEngine.Orchestrator.RunnableProjects/OperationConfig/OperationConfigDefault.cs

@@ -110,6 +110,7 @@ internal OperationConfigDefault(string glob, string flagPrefix, EvaluatorType ev
                         new OperationConfigDefault("**/*.xaml", "<!--", EvaluatorType.CPP, ConditionalType.Xml),
                         new OperationConfigDefault("**/*.axaml", "<!--", EvaluatorType.CPP, ConditionalType.Xml),
                         new OperationConfigDefault("**/*.sln", "#-", EvaluatorType.CPP, ConditionalType.HashSignLineComment),
+                        new OperationConfigDefault("**/*.slnx", "#-", EvaluatorType.CPP, ConditionalType.Xml),
                         new OperationConfigDefault("**/*.yaml", "#-", EvaluatorType.CPP, ConditionalType.HashSignLineComment),
                         new OperationConfigDefault("**/*.yml", "#-", EvaluatorType.CPP, ConditionalType.HashSignLineComment),
                         new OperationConfigDefault("**/Dockerfile", "#-", EvaluatorType.CPP, ConditionalType.HashSignLineComment),

test/Microsoft.TemplateEngine.IDE.IntegrationTests/End2EndTests.cs

@@ -562,6 +562,13 @@ common text
 @"# comment bar
 bar
 baz
+"
+                },
+                {
+"test.slnx",
+@"<!-- comment bar -->
+bar
+baz
 "
                 },
                 {

test/Microsoft.TemplateEngine.TestTemplates/test_templates/TemplateWithConditions/test.slnx

@@ -0,0 +1,9 @@
+<!--#if (A) -->
+<!-- comment foo -->
+foo
+<!--#endif -->
+<!--#if (B)
+<!-- comment bar -- >
+bar
+#endif -->
+baz