New Post: Search Twitter Stream based on Lat and Longitude

Hi hope u r fine.. i want ur help regarding searching the twitter stream based on the geo location coordinates, at the moment im doing something like

                ICoordinates c1 = Geo.GenerateCoordinates(lng1, lat1);
                ICoordinates c2 = Geo.GenerateCoordinates(lng2, lat2);
                var location = Geo.GenerateLocation(c1, c2);

for this to work i have to get two set of coordinates is there a way i can specify just one set of coordinates and specify a radius from where to search the stream like in "searchParameters", also please guide if im doing it right...

Regrads