began working with the Internet in C # and there was such a question. How to make the WebBrowser read textbox.Text and recorded in the URL property?

Answer 1, Authority 100%

something like this:

try {
   WebBrowser.Navigate (New URI (textbox.text));
}
Catch (System.uriformateException E) {
}

Where in textbox.text lies something like http://hashcode.ru/ .

Answer 2, Authority 25%

var uri = new uri (textbox1.text);

URI on MSDN .