Many companies have a web proxy that allows employees to access the Internet, while at the same time preventing outsiders from accessing the company’s internal network. The problem is that to create an application that accesses the Internet from within your company, you must first connect to your proxy and then send information through it, [...]

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You want to send a request to a web server in the form of a GET or POST request. After you send the request to a web server, you want to get the results of that request (the response) from the web server. The WebRequest and WebResponse classes of System.Net namespace encapsulate all of the [...]

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The System.Net.Uri class has a constructor overload that allows you to create a URI from a base path and a relative path while controlling the escaping of the URI. This creates the absolute URI and places it in the Uri.AbsoluteUri property. Escaping/Unescaping can also be controlled through two other overloads of the Uri constructor that [...]

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You have an IP address that you need to resolve into a hostname. The System.Net.Dns class is provided for simple DNS resolution functionality. The Resolve method returns an IPHostEntry that can be used to access the hostname via the HostName property.
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You have a string representation of a host (such as www.funcode.org), and you need to obtain the IP address from this hostname. The System.Net.Dns class is provided for simple DNS resolution functionality. The Resolve method returns an IPHostEntry from which a string of addresses can be constructed and returned.
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To parse a Uri (Uniform Resource Identifier) into its constituent parts, .NET Framework provides System.Net.Uri class that can be used to do the job. Construct a System.Net.Uri object and pass the URI to the constructor. This class constructor parses out the constituent parts of the URI and allows access to them via the [...]

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You have either constructed a regular expression dynamically from your code or based on user input. You need to test the validity of this regular expression’s syntax before you actually use it. This article shows the snippet code for the validation, as following:
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Using regular expression, you can split up a string based on a well-defined set of characters. Using the Split method of the Regex class, we can use a regular expression to indicate the types of tokens and separators that we are interested in gathering. This technique works especially well with equations, since the [...]

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