Add items to share point

Question

Hi,

 

I need to insert items to sharepoint list from webform.

 

However I tried the following code .

 

ClientContext ctx = new ClientContext("https://hp.sharepoint.com/sites/test");

ctx.Credentials = new SharePointOnlineCredentials(username, securePassword);

ctx.RequestTimeout = 180000;

Microsoft.SharePoint.Client.List list = ctx.Web.Lists.GetByTitle("test-1");

Microsoft.SharePoint.Client.ListItem items = list.AddItem(new ListItemCreationInformation());

items["Title"] = "Feedback";

items.Update();

ctx.ExecuteQuery();

 

Am getting the following error.

 

'The request was aborted: Could not create SSL/TLS secure channel'

 

Please help me in resolving this issue