StringDictionary class adds the key as lower-cased

Hi there, In a project I'm currently developing, we used the StringDictionary (In the System.Collections.Specialized namespace) class frequently for stored key value pairs. I noticed that all my keys were lower-cased. So when checking out the Add method with Reflector, I found out that the key is lower-cased. public virtual void Add(string key, string value) { if (key == null) { throw new ArgumentNullException("key"); } this.contents.Add(key.ToLower(CultureInfo.InvariantCulture), value); } As described on MSDN: The key is handled in a case-insensitive manner; it is translated to lowercase before it is used with the string dictionary. So if you want to use a string as a key and want that key string representation exactly to the same as you stored it, that use the following: // Use the Dictionary<string, string> instead of the StringDictionary, since StringDictionary stores it's key as case-insensitive Dictionary<string, string> items = new Dictionary<string, string>(); Nothing fancy, all standard .NET functionality, but this post is written as a reminder for myself and for you as a visitor of my blog. Hope this is usefull! gr, Robbert