The remote server returned an error: (401) Unauthorized error while using Microsoft.SharePoint.Client.dll

Question

I have access to sharepoint site and I have tested this by manually creating the lists and announcements in the sharepoint site.
now the same thing when I try to do it through the c#.net code it always gives me the following :
"An unhandled exception of type 'System.Net.WebException' occurred in
Microsoft.SharePoint.Client.dll Additional information: The remote server returned an error:
(401) Unauthorized."
My code looks like below:
string userName = "[email protected]";
SecureString password = new SecureString();
foreach (char c in "abc123".ToCharArray()) password.AppendChar(c);
using (var context = new ClientContext("https://sharepoint.partners.extranet.adlabs.com/sites/UniTest"))
context.Credentials = new SharePointOnlineCredentials(userName, password);
context.Load(context.Web, w => w.Title);
context.ExecuteQuery();
Krrishna

Answer 1

Hi Krrishna,
You code is used to access SharePoint Online, if you are use SharePoint 2007, we can use SharePoint web service or custom web service to achieve your requirement. 
Lists Web Service
http://msdn.microsoft.com/en-us/library/lists(v=office.12).aspx
Creating a Custom Web Service
http://msdn.microsoft.com/en-us/library/ms464040(v=office.12).aspx
About SharePoint 2007(MOSS 2007), you can also post it to the forum below, you will get more help and confirmed answers there.
https://social.technet.microsoft.com/Forums/en-US/home?forum=sharepointdevelopmentlegacy
Thanks,
Dennis Guo
TechNet Community Support
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Dennis Guo
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