Question WebClient throws Exception if there are more than 2 headers

[Robert_Zenz]

Hello.

I have a problem with the System.Net.WebClient . I'm using it to send POST-Data to an php site and receving the site (which has changed 'cause of this data..whatever). This works fine...but the moment I add more than two headers (Weblcient.Headers.add()) it throws the following Exception (translated):

This header must be changed with the corresponding property. Parametername: name

It throws this exception when I call UploadString...anybody an idea what this is?

Thanks in advance,
Bobby

 

[JohnH]

It means you're trying to add a header through the Headers collection when this header has its own property that must be used. It could be the underlying WebRequest/HttpWebRequest that is throwing this error.

 

[Robert_Zenz]

Hello

Sorry for my late answer.
You're right, I tried to add restricted headers as stated here:WebHeaderCollection Class (System.Net)

But instead of shouting the moment I add this headers the throws the exception the moment he tries to use the, of course, double existing headers.

Tahnks for the Info.

Bobby