Dear All,  Some time you want to add the item in the list which user doesn't have a permission, the below code will impersonate the user in sharepoint to add the code in the list by using domain account  using System; using System.Collections.Generic; using System.Linq; using System.Text; //SharePoint namespace using Microsoft.SharePoint.Client; namespace AddItemsToList { class Program { static void Main(string[] args) { string siteUrl = "http://sharepointserver.com"; ClientContext clientContext = new ClientContext(siteUrl); clientContext.Credentials = newSystem.Net.NetworkCredential(@"domain/userName", "password","domain.com"); Web site = clientContext.Web; //Getting List List list = site.Lists.GetByTitle("Students"); //Adding Items to List ListItemCreationInformation listItemCreationInformation = newListItemCreationInformation(); ListItem listItem = list.AddItem(listItemCreationInformation); li...