public TwitterParametersCollection ChangeSearchParameters(string track = null, string follow = null, string locations = null, string filterlevel = "none", string language = "en")
{
var parameters = new TwitterParametersCollection();
parameters.Create(stall_warnings: false, delimited: false);
if (track != null)
parameters.CreateCommaDelimitedList("track", new List<string> { track });
if (follow != null)
parameters.CreateCommaDelimitedList("follow", new List<string> { follow });
if (locations != null)
parameters.CreateCommaDelimitedList("locations", new List<string> { locations });
parameters.Add("filter_level", filterlevel);
parameters.Add("language", language);
return parameters;
}