Troubles to retrieve data from a sharepoint List 2013

Question

Im having some troubles when i try to retrieve data from a list in sharepoint 2013.
SPSite osite = new SPSite(@"http://contoso.com");
SPWeb web = osite.OpenWeb();
SPList list = web.Lists["Calendar"];
SPListItemCollection collection = list.Items;
foreach (SPListItem item in collection)
Console.WriteLine(item["Title"]);
And im getting this error: System.InvalidOperationException: Exception of type 'System.InvalidOperationException' was thrown.
I did a research in MSDN and i could connect to a diferent list in SharePoint 2010 using Visual Studio 2010, but now im using Visual Studio 2012 to connect to SharePoint 2013 and i dont get the same result.
Im using the DLL Microsoft.SharePoint. 15.0.0.0 
Thanks!

Answer 1

I am not able to trace what could be causing the issue, as I would probably need to look at the entire code. But I quickly put together few lines of code and they seem to work for me on SP 2013 as well as 2010. I have modified your code on these lines, can
you please try the following and let me know if it works:
SPSite osite = new SPSite("http://contoso.com");
SPWeb web = osite.OpenWeb();
string Url = web.ServerRelativeUrl + "/lists/Calendar";
SPList list = web.GetList(Url);
SPListItemCollection collection = list.GetItems();
foreach (SPListItem item in collection)
Console.WriteLine(item["Title"]);
The following link talks about the SPList.GetItems method, hope this helps.
http://msdn.microsoft.com/en-us/library/ms457534(v=office.15).aspx
Vishal