diff --git a/src/Microsoft.IdentityModel.Tokens/InMemoryCryptoProviderCache.cs b/src/Microsoft.IdentityModel.Tokens/InMemoryCryptoProviderCache.cs
index 37b91bf4ab..d97e5c3b55 100644
--- a/src/Microsoft.IdentityModel.Tokens/InMemoryCryptoProviderCache.cs
+++ b/src/Microsoft.IdentityModel.Tokens/InMemoryCryptoProviderCache.cs
@@ -102,12 +102,7 @@ protected override string GetCacheKey(SecurityKey securityKey, string algorithm,
 
         private static string GetCacheKeyPrivate(SecurityKey securityKey, string algorithm, string typeofProvider)
         {
-            return string.Format(CultureInfo.InvariantCulture,
-                                 "{0}-{1}-{2}-{3}",
-                                 securityKey.GetType(),
-                                 securityKey.InternalId,
-                                 algorithm,
-                                 typeofProvider);
+            return $"{securityKey.GetType()}-{securityKey.InternalId}-{algorithm}-{typeofProvider}";
         }
 
         /// <summary>