How do I pass the value into the next page, and how do I use the value in the next page? I want to pass an name from the first page to the next.

use state management techniques.see the below links you can get a clear idea.
http://msdn.microsoft.com/en-us/library/75x4ha6s.ASPX[^]
http://www.c-sharpcorner.com/UploadFile/78d182/Asp-Net-state-management-techniques/[^]
ASP.Net State Management Techniques[^]

In server side you can use session
eg: webpage1

Session["name"]=textbox.text;

you can access this value in page 2 by'

string name=Session["name"];


in client side you can use Querystring,hiddenfield,Viewstate etc

eg: Querystring

page1: Response.Redirect("page2.aspx?name='"+ textbox2.text +"'");


in page 2;
string name=Request.Querystring["name"].tostring();

Try this:

Page 1:

Session["name"] = "name"; //assign value here

Page 2:

string username = Session["name"].ToString();

and see this:
http://www.nullskull.com/a/10400710/eight-different-ways-to-transfer-data-from-one-page-to-another-page.aspx[^]