Definition for method in C++

string UserName = Organization_Manager.OrganizationManager.GetUserNamePassword("SELECT User_Name from User_Table where User_Email = '" + textBoxEmail.Text.Trim() + "'; ", sql);
                string password = Organization_Manager.OrganizationManager.GetUserNamePassword("SELECT User_Pass from User_Table where User_Email = '" + textBoxEmail.Text.Trim() + "'; ", sql);

ERROR : OrganizationManager doesn’t contain definition for ‘GetUserNamePasswor’

try another way, it might work for you