Get current url from browser and modfy url

string path = Request.RawUrl ;
char [] u= {'?'};
string[] p = path.Split(u[0] );
if (p.Length > 0)
{
string p1 = "http://theredzone.org" + p[0];


p1 = p1 + "?Team=" + ddlTeam.SelectedValue.ToString();
Response.Redirect(p1);