/// <summary>
/// Provides culture-invariant serialization of value types, in lower case for querystring readability. Setting a key to null removes it.
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="q"></param>
/// <param name="name"></param>
/// <param name="val"></param>
/// <returns></returns>
public TK Set <T>(string name, T?val) where T : struct, IConvertible
{
return((TK)NameValueCollectionExtensions.Set(this, name, val));
}