sending message SMPP using c#?

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C#

hi i try to send message from my server to cell phone using application SMPP in c# code
i found some free application to send message but i cant understand it
what should be my code to send sms
by the way i already have
IP address , port , source address NPI , Dest address NPI , source TON , dest TON , userName and password , Service Type = SMPP ...
but how can i use this attributes in function to send sms


please try to help :)
thanks alot