var stroka1 = project.Lists["Пользователи"][0];
project.Lists["Пользователи"].RemoveAt(0);
project.Variables["user1"].Value = stroka1;
var stroka2 = project.Lists["Пользователи"][0];
project.Lists["Пользователи"].RemoveAt(0);
project.Variables["user2"].Value = stroka2;
var stroka3 = project.Lists["Пользователи"][0];
project.Lists["Пользователи"].RemoveAt(0);
project.Variables["user1"].Value = stroka3;
var stroka4 = project.Lists["Пользователи"][0];
project.Lists["Пользователи"].RemoveAt(0);
project.Variables["user2"].Value = stroka4;
var stroka5 = project.Lists["Пользователи"][0];
project.Lists["Пользователи"].RemoveAt(0);
project.Variables["user1"].Value = stroka5;