How to make SQL Server Equal Match Case Sensitive

in my web page i do have option for registration, now i want to send the password to given mail address for completion of registration and req for password change for first time login

can u tell me the login verification case sensitive password

protected void Login2_Authenticate1(object sender, AuthenticateEventArgs e)
    {
        try
        {
            string uname = Login2.UserName.Trim(); //Get the username from the control
            string password = Login2.Password.Trim(); //get the Password from the control
            bool flag = AuthenticateAdminUser(uname, password);
            if (flag == true)
            {
                e.Authenticated = true;
                Session.Add("adminusername", Login2.UserName);
                Login2.DestinationPageUrl = "Admin.aspx";
            }
            else
                e.Authenticated = false;
        }
        catch (Exception)
        {
            e.Authenticated = false;
        }
    }
    private bool AuthenticateAdminUser(string uname, string password)
    {
        bool bflag = false;
        string strSQL = "select * from admin_login where cAdmin_Id ='" + uname + "' AND cAdmin_pass ='" + password + "'";
        DataSet userDS = new DataSet();
        SqlConnection m_conn;
        SqlDataAdapter m_dataAdapter;
        try
        {
            m_conn = new SqlConnection(conn);
            SqlCommand m_Command = new SqlCommand(strSQL, m_conn);
            m_conn.Open();
            m_dataAdapter = new SqlDataAdapter(strSQL, m_conn);
            m_dataAdapter.Fill(userDS);
            m_conn.Close();
        }
        catch (Exception ex)
        {
            userDS = null;
        }
        if (userDS != null)
        {
            if (userDS.Tables[0].Rows.Count > 0)
                bflag = true;
        }
        return bflag;
    }

this code is working but not case sensitive