What's the difference between WebClient DefaultCredentials and NetworkCredentials?

For some reason my WebClient app that used to work using DefaultCredentials now gives me a 401 Unauthorized. Using NetworkCredentials with the exact same ID and PW works.

Something must have changed on the web server, but I have no control of that. I just find it strange that ther开发者_JAVA百科e is a difference between DefaultCredentials and NetworkCredentials.

What could possibly be the difference and how to debug?

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Did you read the msdn article and this?

They say DefaultCredentials represents the credentials of the local user. But I cannot answer you why it was working in the past. Username and password is the same like in the past?

Or do you mean another property as WebClient.Credentials ?