DLL registration in C #

My POS client in C # Program Call someone else's api_com.dll program, and then I use a third-party tool to automatically update the client. Now there is a problem. Every time there is a new version, the automatic update program always copies the original directory to the new directory. As a result, api_com.dll in the new directory is not registered and the program cannot run. Could you tell me, is there any way for api_com.dll to be registered only once (during installation) or globally. Or, in C #, how to write Code To realize the DLL registration function ??????????? Execommand ("regsvr32 path \ ***. dll ") Public String Execommand (string commandtext) {PROCESS p = new process (); p. startinfo. filename = "cmd.exe"; p. startinfo. useshellexecute = false; p. startinfo. redirectstandardinput = true; p. startinfo. redirectstandardoutput = true; p. startinfo. redirectstandarderror = true; p. startinfo. createnowindow = true; string stroutput = NULL; try {P. start (); p. standardinput. writeline ( Commandtext ); P. standardinput. writeline ("exit"); stroutput = P. standardoutput. readtoend (); p. waitforexit (); p. close ();} catch (exception e) {stroutput = E. message;} return stroutput ;}