diff --git a/src/Microsoft.AspNetCore.Razor.Design/Internal/AssemblyTagHelperDescriptorResolver.cs b/src/Microsoft.AspNetCore.Razor.Design/Internal/AssemblyTagHelperDescriptorResolver.cs
index 8d61741..e5e1acf 100644
--- a/src/Microsoft.AspNetCore.Razor.Design/Internal/AssemblyTagHelperDescriptorResolver.cs
+++ b/src/Microsoft.AspNetCore.Razor.Design/Internal/AssemblyTagHelperDescriptorResolver.cs
@@ -14,10 +14,14 @@ namespace Microsoft.AspNetCore.Razor.Design.Internal
 {
     public class AssemblyTagHelperDescriptorResolver
     {
+        private const string TypeFullName = "Microsoft.AspNetCore.Mvc.DesignTimeMvcServiceCollectionProvider";
+        private const string MvcAssemblyName = "Microsoft.AspNetCore.Mvc";
+        private const string MethodName = "PopulateServiceCollection";
+
         private readonly TagHelperDescriptorFactory _tagHelperDescriptorFactory;
         private readonly TagHelperTypeResolver _tagHelperTypeResolver;
 
-        private bool _loadedAssembly;
+        private bool _isInitialized;
         private bool _hasMvcAssembly;
         private object _serviceCollectionProviderClassInstance;
         private MethodInfo _populateMethod;
@@ -54,9 +58,9 @@ public IEnumerable<TagHelperDescriptor> Resolve(string assemblyName, ErrorSink e
                         typeof(TagHelperDescriptor).FullName, ProtocolVersion));
             }
 
-            if (!_loadedAssembly)
+            if (!_isInitialized)
             {
-                LoadMvcAssembly();
+                EnsureMvcInitialized();
             }
 
             ITagHelperDescriptorResolver resolver;
@@ -101,17 +105,13 @@ protected virtual IEnumerable<Type> GetTagHelperTypes(string assemblyName, Error
             return _tagHelperTypeResolver.Resolve(assemblyName, SourceLocation.Zero, errorSink);
         }
 
-        private void LoadMvcAssembly()
+        private void EnsureMvcInitialized()
         {
-            const string typeFullName = "Microsoft.AspNetCore.Mvc.DesignTimeMvcServiceCollectionProvider";
-            const string assemblyName = "Microsoft.AspNetCore.Mvc";
-            const string methodName = "PopulateServiceCollection";
-
-            _loadedAssembly = true;
+            _isInitialized = true;
 
             try
             {
-                var providerClass = Type.GetType($"{typeFullName}, {assemblyName}", throwOnError: true);
+                var providerClass = Type.GetType($"{TypeFullName}, {MvcAssemblyName}", throwOnError: true);
 
                 _serviceCollectionProviderClassInstance = Activator.CreateInstance(providerClass);
 
@@ -119,7 +119,7 @@ private void LoadMvcAssembly()
                 _populateMethod = providerClass.GetMethods(BindingFlags.Public | BindingFlags.Static)
                     .FirstOrDefault(methodInfo =>
                     {
-                        if (string.Equals(methodName, methodInfo.Name, StringComparison.Ordinal)
+                        if (string.Equals(MethodName, methodInfo.Name, StringComparison.Ordinal)
                             && methodInfo.ReturnParameter.ParameterType.Equals(typeof(void)))
                         {
                             var methodParams = methodInfo.GetParameters();