How to Add, Update and Delete List Items Programmatically in SharePoint.

Using below code you can add,update and delete the SharePoint list items.

       using (SPSite site = new SPSite(SPContext.Current.Web.Site.ID))

            {

                using (SPWeb web = site.OpenWeb())

                {

                    web.AllowUnsafeUpdates = true;

                    SPList list = web.Lists["Test List"];

                    //Code for add the values in List

                    SPListItem item = list.Items.Add();

                    item["Title"] = "Test Title";

                    item["Name"] = "Test Name";

                    item.Update();

                    //Code for updating the List items

                    SPListItem itemUpdate = list.GetItemById(1);

                    item["Name"] = "update Name";

                    itemUpdate.Update();

                    // Code for deleting  the List items

                    SPListItem itemDelete = list.GetItemById(1);

                    itemDelete.Delete();

                    web.AllowUnsafeUpdates = false;

                }

            }