To check the Valid IP Address in c#

To check the Valid IP Address in c#

What is IP Address (Taken from Wikipedia) : -

An Internet Protocol address (also known as an IP address) is a numerical label assigned to each device (e.g., computer, printer) participating in a computer network that uses the Internet Protocol for communication. An IP address serves two principal functions: host or network interface identification and location addressing. Its role has been characterized as follows: "A name indicates what we seek. An address indicates where it is. A route indicates how to get there.

In IPv4 an address consists of 32 bits which limits the address space to 4294967296 (2³²) possible unique addresses. IPv4 reserves some addresses for special purposes such as private networks (~18 million addresses) or multicast addresses (~270 million addresses).

IPv4 addresses are canonically represented in dot-decimal notation, which consists of four decimal numbers, each ranging from 0 to 255, separated by dots, e.g., 172.16.254.1. Each part represents a group of 8 bits (octet) of the address. In some cases of technical writing, IPv4 addresses may be presented in various hexadecimal, octal, or binary representations.

A valid IP address must be in the form of xxx.xxx.xxx.xxx, where xxx is a number from 0-255. There are a few reserved addresses has cannot be used. 10.x.x.x cannot be used along with 192.168.x.x, 172.16.0.0 to 172.31.255.255.

Program to find out the valid IP Address:-

/// <summary>       /// to check the Valid IP Address.       /// </summary>       private bool IsValidIPList(out IPAddress ipAddress)       {           bool isIPValid = false;           ipAddress = null;                                         // for checking how many "." is available in the given textbox.                               List<string> lstIP = txtPOSLynxIP.Text.Trim().Split('.').ToList();           // if there is 4 ".", it means valid dots in any IPAddress.                     if (lstIP.Count == 4)                     isIPValid = IPAddress.TryParse(txtPOSLynxIP.Text.Trim(), out ipAddress);           return isIPValid;       }