i am login ,i want create table with use username , but i see this error.
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data.SqlClient;

public partial class Home : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        Session["userName"]= User.Identity.Name;
        string u = Session["userName"].ToString();

        if (IsPostBack==false && u!="Admin")
        {
            SqlConnection connect = new SqlConnection();
            connect.ConnectionString = "Data Source=.;Initial Catalog=AspNetSqlProvider;Integrated Security=True";
            //string idSelect=string.Format("select UserId from aspnet_Users where UserName = '{0}'",u);
            string query1 = string.Format("CREATE TABLE {0}.Profile(ID uniqueidentifier not null,name nvarchar(20) not null,about text null,pic image null) ", u);
            SqlCommand cmd = new SqlCommand(query1, connect);
            cmd.Connection.Open();
            cmd.ExecuteNonQuery();
            cmd.Connection.Close();

            //AND CREATE TABLE {0}.Friend (ID uniqueidentifier not null,name nvarchar(20) not null,popular bit null) AND CREATE TABLE {0}.Post(ID_Post int not null,sendItem text null,Img image null)

        }
        else
        {
            Label1.Text = "ok";
        }

        

    }
}