Remove usage of TypeSwitch.

src/Workspaces/CSharp/Portable/Extensions/SyntaxNodeExtensions.cs

@@ -881,18 +881,20 @@ public static bool IsEmbeddedStatementOwner(this SyntaxNode node)
 
         public static StatementSyntax GetEmbeddedStatement(this SyntaxNode node)
         {
-            return node.TypeSwitch(
-                (DoStatementSyntax n) => n.Statement,
-                (ElseClauseSyntax n) => n.Statement,
-                (FixedStatementSyntax n) => n.Statement,
-                (CommonForEachStatementSyntax n) => n.Statement,
-                (ForStatementSyntax n) => n.Statement,
-                (IfStatementSyntax n) => n.Statement,
-                (LabeledStatementSyntax n) => n.Statement,
-                (LockStatementSyntax n) => n.Statement,
-                (UsingStatementSyntax n) => n.Statement,
-                (WhileStatementSyntax n) => n.Statement,
-                (SyntaxNode n) => null);
+            switch (node)
+            { 
+                case DoStatementSyntax n: return n.Statement;
+                case ElseClauseSyntax n: return n.Statement;
+                case FixedStatementSyntax n: return n.Statement;
+                case CommonForEachStatementSyntax n: return n.Statement;
+                case ForStatementSyntax n: return n.Statement;
+                case IfStatementSyntax n: return n.Statement;
+                case LabeledStatementSyntax n: return n.Statement;
+                case LockStatementSyntax n: return n.Statement;
+                case UsingStatementSyntax n: return n.Statement;
+                case WhileStatementSyntax n: return n.Statement;
+                default: return null;
+            }
         }
 
         public static SyntaxTokenList GetModifiers(this SyntaxNode member)