Simple query string builder for clients.

QueryStringBuilder.cs

public class QueryStringBuilder : NameValueCollection
{
    public QueryStringBuilder()
        : base(StringComparer.InvariantCultureIgnoreCase) { }

    public QueryStringBuilder(NameValueCollection collection)
        : base(StringComparer.InvariantCultureIgnoreCase)
    {
        Add(collection);
    }

    public QueryStringBuilder(object items)
        : base(StringComparer.InvariantCultureIgnoreCase)
    {
        if (items != null)
        {
            foreach (var propertyInfo in items.GetType().GetProperties())
            {
                base.Add(
                	propertyInfo.Name, 
                    (propertyInfo.GetValue(items, null) ?? "").ToString());
            }
        }
    }

    public override string ToString()
    {
        var builder = new StringBuilder();

        var first = true;
        foreach (var item in AllKeys)
        {
            builder.AppendFormat("{0}{1}={2}", 
                first ? "?" : "&",
                Uri.EscapeUriString(item),
                Uri.EscapeUriString(this[item]));

            first = false;
        }

        return builder.ToString();
    }
}