Definition for method in C++

Get Help C++
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#1 
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’

#2

try another way, it might work for you