Hello cisco man,
As for the WebRequest.GetSystemWebPRoxy it does return a
"System.Net.WebRequest+WebProxyWrapperOpaque" type which is internal.
Actually, when using the returned object from WebRequest.GetSystemWebProxy
method, you're always suggested to use the "IWebProxy" interface as that
interface has provide all the necessary properties.
For the "useDefaultCredentials" property of WebProxy class, it simply
assign the corresponding credentials to the IWebProxy.Credentials
property(according to the given value). Here is the diassembed code from
reflector:
=====from WebProxy class======
public bool UseDefaultCredentials
{
get
{
if (!(this.Credentials is SystemNetworkCredential))
{
return false;
}
return true;
}
set
{
this._Credentials = value ? CredentialCache.DefaultCredentials
: null;
}
}
public ICredentials Credentials
{
get
{
return this._Credentials;
}
set
{
this._Credentials = value;
}
}
================
therefore, the setting "UseDefaultCredentials" of WebProxy to true is
identical to the following code (for IWebProxy):
=======================
IWebProxy proxy = WebRequest.GetSystemWebProxy();
proxy.Credentials = System.Net.CredentialCache.DefaultCredentials;
=======================
Hope this helps.
Sincerely,
Steven Cheng
Microsoft MSDN Online Support Lead
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