using session for login and logout in asp.net
firstly open the "Global.aspx". then create a function there protected void Application_Start() { //we give the name of the session here and declare it null ..username is the name of the session //we can change it according to our needs Sesssion["username"]=""; } now we can create the function where we are login as function boolean login( string username, string password) { // firstly we match the login details from the database. if(username == logincredintialfromdb && password ==logincredintialfromdb ) { // the values are matched here so are assiging the value to the session variable Session["username"]= username ; return true; } else { return false; } }