Fixed #18882

src/EditorFeatures/CSharpTest/CodeActions/InlineTemporary/InlineTemporaryTests.cs

@@ -4491,8 +4491,7 @@ class C
     void M()
     {
         var t = new {
-            /*comment*/
-            i = 1 + 2,
+            /*comment*/ i = 1 + 2,
             /*comment*/ j = 3
         };
     }

src/Workspaces/CSharp/Portable/Simplification/CSharpSimplificationService.Expander.cs

@@ -332,7 +332,7 @@ public override SyntaxNode VisitAnonymousObjectMemberDeclarator(AnonymousObjectM
                     var inferredName = node.Expression.TryGetInferredMemberName();
                     if (inferredName != null)
                     {
-                        var identifier = SyntaxFactory.Identifier(inferredName);
+                        var identifier = SyntaxFactory.Identifier(SyntaxTriviaList.Empty, inferredName, SyntaxTriviaList.Empty);
                         identifier = TryEscapeIdentifierToken(identifier, node, _semanticModel);
 
                         newDeclarator = newDeclarator