if condition for more true result

Question

each true condition has different result and each if condition is  false means result statement is same.  how to get this?


if(codtn=="akkjdg"&&cond=="hjdgfh"&&cond=="jghfgjkf")

{
if 1st cond means 

form frm=new frm();
frm.show();
}

if 2nd condn means
{
form frm=new frm();
frm.show();

}
else
{
MassageBox.Show("enter the value or should not null")
}