fix a couple snippets (#767)

Author: BillWagner

snippets/csharp/new-in-7/Program.cs

@@ -111,11 +111,12 @@ private static void TupleDeclarations()
 
             // <SnippetNamedTuple>
             (string Alpha, string Beta) namedLetters = ("a", "b");
-            Console.WriteLine(namedLetters.Alpha, namedLetters.Beta);
+            Console.WriteLine($"{namedLetters.Alpha}, {namedLetters.Beta}");
             // </SnippetNamedTuple>
 
             // <SnippetImplicitNamedTuple>
             var alphabetStart = (Alpha: "a", Beta: "b");
+            Console.WriteLine($"{alphabetStart.Alpha}, {alphabetStart.Beta}");
             // </SnippetImplicitNamedTuple>
         }
 

snippets/csharp/new-in-7/patternmatch.cs

@@ -45,7 +45,6 @@ void test(object obj)
         }
         public static void SwitchPatternFull()
         {
-            // <SnippetSimpleSwitchPattern>
             test(5);
 
             // <SnippetNullableSwitch>
@@ -106,8 +105,6 @@ void test(object obj)
                         break;
                 }
             }
-
-            // </SnippetSimpleSwitchPattern>
         }
     }
 }