C # verifies that a given IP address is legitimate

function is used to detect the IP address format is legitimate, including the composition of the IP format, each segment is not more than 255, etc., but this function can not verify that the IP address can be ping pass.

/// <summary>///Verify that the IP address is legitimate/// </summary>/// <param name= "IP" >the IP address to verify</param> Public Static BOOLIsIP (stringIP) {//if empty, the validation is considered to be qualifiedif(IsNullOrEmpty (IP)) {return true;}//clear spaces in the string to validateIP =IP. Trim ();//Pattern StringstringPattern =@"^ ((2[0-4]\d|25[0-5]|[ 01]?\d\d?) \.) {3} (2[0-4]\d|25[0-5]| [01]?\d\d?] $";//Validationreturnregexhelper.ismatch (IP, pattern);}

C # verifies that a given IP address is legitimate