diff --git a/src/MvcSiteMapProvider/MvcSiteMapProvider/Builder/SiteMapBuilderSet.cs b/src/MvcSiteMapProvider/MvcSiteMapProvider/Builder/SiteMapBuilderSet.cs
index dd9f7c8d..095edb55 100644
--- a/src/MvcSiteMapProvider/MvcSiteMapProvider/Builder/SiteMapBuilderSet.cs
+++ b/src/MvcSiteMapProvider/MvcSiteMapProvider/Builder/SiteMapBuilderSet.cs
@@ -104,7 +104,7 @@ public virtual bool UseTitleIfDescriptionNotProvided
 
         public virtual bool AppliesTo(string builderSetName)
         {
-            return this.instanceName.Equals(builderSetName, StringComparison.InvariantCulture);
+            return this.instanceName.Equals(builderSetName, StringComparison.Ordinal);
         }
 
         #endregion
diff --git a/src/MvcSiteMapProvider/MvcSiteMapProvider/Collections/Specialized/RouteValueDictionary.cs b/src/MvcSiteMapProvider/MvcSiteMapProvider/Collections/Specialized/RouteValueDictionary.cs
index 244f3135..e9aae2bd 100644
--- a/src/MvcSiteMapProvider/MvcSiteMapProvider/Collections/Specialized/RouteValueDictionary.cs
+++ b/src/MvcSiteMapProvider/MvcSiteMapProvider/Collections/Specialized/RouteValueDictionary.cs
@@ -305,7 +305,7 @@ protected virtual bool MatchesRouteValue(string key, object value)
 
         protected virtual bool MatchesValue(string key, object value)
         {
-            return this[key].ToString().Equals(value.ToString(), StringComparison.InvariantCultureIgnoreCase);
+            return this[key].ToString().Equals(value.ToString(), StringComparison.OrdinalIgnoreCase);
         }
 
         protected virtual bool IsEmptyValue(object value)
diff --git a/src/MvcSiteMapProvider/MvcSiteMapProvider/CompositeSiteMapNodeVisibilityProvider.cs b/src/MvcSiteMapProvider/MvcSiteMapProvider/CompositeSiteMapNodeVisibilityProvider.cs
index c70eaf38..e183e651 100644
--- a/src/MvcSiteMapProvider/MvcSiteMapProvider/CompositeSiteMapNodeVisibilityProvider.cs
+++ b/src/MvcSiteMapProvider/MvcSiteMapProvider/CompositeSiteMapNodeVisibilityProvider.cs
@@ -42,7 +42,7 @@ public bool IsVisible(ISiteMapNode node, IDictionary<string, object> sourceMetad
 
         public bool AppliesTo(string providerName)
         {
-            return this.instanceName.Equals(providerName, StringComparison.InvariantCulture);
+            return this.instanceName.Equals(providerName, StringComparison.Ordinal);
         }
 
         #endregion
diff --git a/src/MvcSiteMapProvider/MvcSiteMapProvider/SiteMap.cs b/src/MvcSiteMapProvider/MvcSiteMapProvider/SiteMap.cs
index e1d78761..fbac7fd5 100644
--- a/src/MvcSiteMapProvider/MvcSiteMapProvider/SiteMap.cs
+++ b/src/MvcSiteMapProvider/MvcSiteMapProvider/SiteMap.cs
@@ -899,7 +899,7 @@ protected virtual void ThrowIfHttpMethodInvalid(ISiteMapNode node)
             if (string.IsNullOrEmpty(node.HttpMethod) || 
                 (!EnumHelper.TryParse<HttpVerbs>(node.HttpMethod, true, out verbs) && 
                 !node.HttpMethod.Equals("*") && 
-                !node.HttpMethod.Equals("Request", StringComparison.InvariantCultureIgnoreCase)))
+                !node.HttpMethod.Equals("Request", StringComparison.OrdinalIgnoreCase)))
             {
                 var allowedVerbs = string.Join(Environment.NewLine, Enum.GetNames(typeof(HttpVerbs))) + Environment.NewLine + "Request" + Environment.NewLine + "*";
                 throw new MvcSiteMapException(string.Format(Resources.Messages.SiteMapNodeHttpMethodInvalid, node.Key, node.Title, node.HttpMethod, allowedVerbs));
diff --git a/src/MvcSiteMapProvider/MvcSiteMapProvider/Web/Mvc/SiteMapHttpRequest.cs b/src/MvcSiteMapProvider/MvcSiteMapProvider/Web/Mvc/SiteMapHttpRequest.cs
index ccfde816..fb00ec93 100644
--- a/src/MvcSiteMapProvider/MvcSiteMapProvider/Web/Mvc/SiteMapHttpRequest.cs
+++ b/src/MvcSiteMapProvider/MvcSiteMapProvider/Web/Mvc/SiteMapHttpRequest.cs
@@ -65,7 +65,7 @@ public override string HttpMethod
             {
                 bool useRequest = this.node == null || 
                     string.Equals(this.node.HttpMethod, "*") || 
-                    string.Equals(this.node.HttpMethod, "request", StringComparison.InvariantCultureIgnoreCase);
+                    string.Equals(this.node.HttpMethod, "request", StringComparison.OrdinalIgnoreCase);
                 if (!useRequest)
                 {
                     return string.IsNullOrEmpty(this.node.HttpMethod)
diff --git a/src/MvcSiteMapProvider/MvcSiteMapProvider/Web/UrlPath.cs b/src/MvcSiteMapProvider/MvcSiteMapProvider/Web/UrlPath.cs
index 59991d4f..8c79f694 100644
--- a/src/MvcSiteMapProvider/MvcSiteMapProvider/Web/UrlPath.cs
+++ b/src/MvcSiteMapProvider/MvcSiteMapProvider/Web/UrlPath.cs
@@ -389,7 +389,7 @@ public bool IsExternalUrl(string url, HttpContextBase httpContext)
             {
                 var publicFacingUrl = this.GetPublicFacingUrl(httpContext);
                 var isDifferentHost = !uri.Host.ToLowerInvariant().Equals(publicFacingUrl.Host.ToLowerInvariant());
-                var isDifferentVirtualApplication = !uri.AbsolutePath.StartsWith(httpContext.Request.ApplicationPath, StringComparison.InvariantCultureIgnoreCase);
+                var isDifferentVirtualApplication = !uri.AbsolutePath.StartsWith(httpContext.Request.ApplicationPath, StringComparison.OrdinalIgnoreCase);
 
                 return (isDifferentHost || isDifferentVirtualApplication);
             }