Exception downloading HTML code

I'm trying to download the HTML code of one website using new WebClient().DownloadString() but I'm getting this exception all the time:

The underlying connection was close开发者_如何学运维d. An unexpected error occured on a receive

Does anyone know how to solve this problem?

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Check out this question. You might find the same solution works for you

Dotnet webclient timesout but browser works file for json webservice