Unnecessary double allocation in DictionaryTKeyEnumTValueConverter.cs (#40192)

Author: rextor92

docs/standard/serialization/system-text-json/snippets/how-to/csharp/DictionaryTKeyEnumTValueConverter.cs

@@ -25,8 +25,9 @@ public override JsonConverter CreateConverter(
             Type type,
             JsonSerializerOptions options)
         {
-            Type keyType = type.GetGenericArguments()[0];
-            Type valueType = type.GetGenericArguments()[1];
+            Type[] typeArguments = type.GetGenericArguments();
+            Type keyType = typeArguments[0];
+            Type valueType = typeArguments[1];
 
             JsonConverter converter = (JsonConverter)Activator.CreateInstance(
                 typeof(DictionaryEnumConverterInner<,>).MakeGenericType(