public string GetQueryString()
{
var query = string.Empty;
if (QueryCollection.Any())
{
query += "?";
}
var index = 0;
foreach (var pair in QueryCollection)
{
if (index > 0)
{
query += "&";
}
query += "$" + pair.Key + "=" + pair.Value;
index += 1;
}
return(query);
}