install Myphoneexplorer both on pc and mobile connect them with wifi Bluetooth or USB then connect your PC and mobile then use the following code to send SMS or any other action you want to do which is mentioned here https://www.fjsoft.at/forum/viewtopic.php?t=42&sid=04edc8027852e72f7c8679d6f3a137ac

 Process.Start("C:\Program Files (x86)\MyPhoneExplorer\MyPhoneExplorer.exe", "action=sendmessage savetosent=1 number=0123456789 text="your text here.%n Any text")