FixedSizeBuilder.AddRange: Fix logic error

Author: DustinCampbell

src/Compiler/Microsoft.CodeAnalysis.Razor.Compiler/src/Language/TagHelperCollection.FixedSizeBuilder.cs

@@ -59,7 +59,7 @@ public void AddRange(TagHelperCollection collection)
         {
             foreach (var item in collection)
             {
-                if (!_set.Add(item.Checksum))
+                if (_set.Add(item.Checksum))
                 {
                     AppendItem(item);
                 }
@@ -71,7 +71,7 @@ public void AddRange(ReadOnlySpan<TagHelperDescriptor> span)
         {
             foreach (var item in span)
             {
-                if (!_set.Add(item.Checksum))
+                if (_set.Add(item.Checksum))
                 {
                     AppendItem(item);
                 }
@@ -83,7 +83,7 @@ public void AddRange(IEnumerable<TagHelperDescriptor> source)
         {
             foreach (var item in source)
             {
-                if (!_set.Add(item.Checksum))
+                if (_set.Add(item.Checksum))
                 {
                     AppendItem(item);
                 }

src/Compiler/Microsoft.CodeAnalysis.Razor.Compiler/src/Language/TagHelperCollection_Factories.cs

@@ -1,4 +1,4 @@
-// Licensed to the .NET Foundation under one or more agreements.
+// Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
 using System;
@@ -43,10 +43,7 @@ static TagHelperCollection BuildCollection(ReadOnlySpan<TagHelperDescriptor> spa
         {
             using var builder = new FixedSizeBuilder(span.Length);
 
-            foreach (var item in span)
-            {
-                builder.Add(item);
-            }
+            builder.AddRange(span);
 
             return builder.ToCollection();
         }