Is there a way for a program in C#, ran on a client system to see their desktop activity from my HOST machine (i.e. Remote desktop tools like anydesk etc.)?

Thanks Rick,

I tried to use mentioned solution but it gives the below error message !
I setup the Remote server application at targeted machine & added TCP port 400 & password correctly !
Please help !

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Error Message :

You're a Failure!
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Invalid IPAddress, Invalid Port, Failed Internet Connection, or Cannot connect to client for some reason, check firewall in windows and router.

Technical Data:
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System.Net.Sockets.SocketException: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond xxx.xxx.xxx.xxx:4000

at System.Net.Sockets.TcpClient..ctor(String hostname, Int32 port)

at RemoteClient.FrmMain.RunConnect()

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Thanks
Jags