c# 4.0 - How to detect machine is online? -

c# 4.0 - How to detect machine is online? -

i want observe number of online (which has ping successful) machines in network.

with 2 conditions 1) don't know workgroup/domain (there may possibility 2 machines have different workgroups) 2) don't know ip address or mac address.

in short, should returns machines (ip addresses) in same networks (say same lan).

try using nmap can give rang , port

c#-4.0 wmi