simplify

src/Features/Core/Portable/GenerateFromMembers/AbstractGenerateFromMembersCodeRefactoringProvider.cs

@@ -90,7 +90,7 @@ private static bool IsViableProperty(IPropertySymbol property)
         protected static ImmutableArray<IParameterSymbol> DetermineParameters(
             ImmutableArray<ISymbol> selectedMembers, ImmutableArray<NamingRule> rules)
         {
-            var parameters = ArrayBuilder<IParameterSymbol>.GetInstance();
+            using var _ = ArrayBuilder<IParameterSymbol>.GetInstance(out var parameters);
 
             foreach (var symbol in selectedMembers)
             {
@@ -113,7 +113,7 @@ private static bool IsViableProperty(IPropertySymbol property)
                     name: parameterName));
             }
 
-            return parameters.ToImmutableAndFree();
+            return parameters.ToImmutable();
         }
 
         protected static readonly SymbolDisplayFormat SimpleFormat =

src/Features/Core/Portable/GenerateMember/GenerateDefaultConstructors/AbstractGenerateDefaultConstructorsService.cs

@@ -30,25 +30,21 @@ protected AbstractGenerateDefaultConstructorsService()
             {
                 var semanticDocument = await SemanticDocument.CreateAsync(document, cancellationToken).ConfigureAwait(false);
 
-                var result = ArrayBuilder<CodeAction>.GetInstance();
+                using var _ = ArrayBuilder<CodeAction>.GetInstance(out var result);
                 if (textSpan.IsEmpty)
                 {
                     var state = State.Generate((TService)this, semanticDocument, textSpan, cancellationToken);
                     if (state != null)
                     {
                         foreach (var constructor in state.UnimplementedConstructors)
-                        {
                             result.Add(new GenerateDefaultConstructorCodeAction(document, state, constructor));
-                        }
 
                         if (state.UnimplementedConstructors.Length > 1)
-                        {
                             result.Add(new CodeActionAll(document, state, state.UnimplementedConstructors));
-                        }
                     }
                 }
 
-                return result.ToImmutableAndFree();
+                return result.ToImmutable();
             }
         }
     }