how to display a session value in an ASP textbox

Question

A basic question but there is no such question on Stack Overflow (for ASP.NET)

Answer 1

What I did was pulled the text box in C# code and set it text value to the session. Example:

txtUserName.text = Session["UserName"];

Use it in one of the function which checks the session values or you can use in page_load function (the default function for every page)