See this page for why I wrote this.

The classes contained don't offer a whole lot, but there are some useful bits. 

IPAddressUtil

• GetAddress:  Returns an IPAddress based on a byte array representation of an IP address.  v1.1 of the framework supports a constructor that takes the same parameter.
• GetAddressBytes:  Returns a byte array representation of an IP address.  Takes an IPAddress or dotted-IP string.
• GetAddresses:  Returns an array of dotted-IP addresses or IPAddress objects based on the start and end IP addresses passed to it (strings or IPAddresses).
• GetRangeCount:  Returns the number of IP addresses in a range.  Takes strings or IPAddresses.

Ping

• PingHost:  Pings a host and returns true/false based on success.  Only works on XP and above since it uses the WMI Win32_PingStatus class.

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