In sharepoint 2010, Using client object model ,The remote server returned an error: (500) Internal Server Error

Question

try
{
    web = context.Web;
    List list = context.Web.Lists.GetByTitle(listName);
    CamlQuery query = new CamlQuery();
    if (sprootpath == null)
    {
        query.FolderServerRelativeUrl = "/" + listName + "/";
    }
    else
    {
        query.FolderServerRelativeUrl = "/" + sprootpath + "/";
    }
    var listItems = list.GetItems(query);
    context.Load(listItems);
    context.ExecuteQuery();

}
catch (Exception ex)
{
    Debug.Write(ex);    
    return false;
}

1. I tried ClientContext context = ClaimClientContext.GetAuthenticatedContext(siteUrl, 800, 600); which generated an auto pop up for login. Then after that the context object is passed to the method above.

2. I tried clientCtx.Credentials = new NetworkCredential("username", "password", "domain")

3. Checked SharePoint app pools, claim service in central admin & IIS admin services in Windows services are in running state. - Running

Answer 1

This is salesforce example but very useful and help

https://help.salesforce.com/articleView?id=000221207&type=1