Yes we can.
I tried this and it worked.
default.aspx.cs
Set the
postbackurl
on a button click to
"DEfault6.aspx?id=5"
default6.aspx.cs
protected void Page_Load(object sender, EventArgs e)
{
string s = Request.QueryString["id"] as string;
}
an the value of s was 5 after i ran it.