internal DataTable GetDataTableFromListItemCollection()
        {
            string strWhere = string.Empty;
            DataTable dtGetReqForm = new DataTable();
            using (var clientContext = new ClientContext("sharepoint host url"))
            {
                try
                {
                    Microsoft.SharePoint.Client.List spList = clientContext.Web.Lists.GetByTitle("ReqList");
                    clientContext.Load(spList);
                    clientContext.ExecuteQuery();

                    if (spList != null && spList.ItemCount > 0)
                    {
                        Microsoft.SharePoint.Client.CamlQuery camlQuery = new CamlQuery();
                        camlQuery.ViewXml =
                        @"<View>" +
                        "<Query> " +
                            "<Where>" +
                                "<And>" +
                                        "<IsNotNull><FieldRef Name='ID' /></IsNotNull>" +
                                        "<Eq><FieldRef Name='ReqNo' /><Value Type='Text'>123</Value></Eq>" +
                                "</And>" +
                            "</Where>" +
                        "</Query> " +
                        "<ViewFields>" +
                            "<FieldRef Name='ID' />" +
                        "</ViewFields>" +
                        "</View>";

                        SPClient.ListItemCollection listItems = spList.GetItems(camlQuery);
                        clientContext.Load(listItems);
                        clientContext.ExecuteQuery();

                        if (listItems != null && listItems.Count > 0)
                        {
                            foreach (var field in listItems[0].FieldValues.Keys)
                            {
                                dtGetReqForm.Columns.Add(field);
                            }

                            foreach (var item in listItems)
                            {
                                DataRow dr = dtGetReqForm.NewRow();

                                foreach (var obj in item.FieldValues)
                                {
                                    if (obj.Value != null)
                                    {
                                        string key = obj.Key;
                                        string type = obj.Value.GetType().FullName;

                                        if (type == "Microsoft.SharePoint.Client.FieldLookupValue")
                                        {
                                            dr[obj.Key] = ((FieldLookupValue)obj.Value).LookupValue;
                                        }
                                        else if (type == "Microsoft.SharePoint.Client.FieldUserValue")
                                        {
                                            dr[obj.Key] = ((FieldUserValue)obj.Value).LookupValue;
                                        }
                                        else if (type == "Microsoft.SharePoint.Client.FieldUserValue[]")
                                        {
                                            FieldUserValue[] multValue = (FieldUserValue[])obj.Value;
                                            foreach (FieldUserValue fieldUserValue in multValue)
                                            {
                                                dr[obj.Key] += (fieldUserValue).LookupValue;
                                            }
                                        }
                                        else if (type == "System.DateTime")
                                        {
                                            if (obj.Value.ToString().Length > 0)
                                            {
                                                var date = obj.Value.ToString().Split(' ');
                                                if (date[0].Length > 0)
                                                {
                                                    dr[obj.Key] = date[0];
                                                }
                                            }
                                        }
                                        else
                                        {
                                            dr[obj.Key] = obj.Value;
                                        }
                                    }
                                    else
                                    {
                                        dr[obj.Key] = null;
                                    }
                                }
                                dtGetReqForm.Rows.Add(dr);
                            }
                        }
                    }
                }
                catch (Exception ex)
                {
                }
                finally
                {
                    if (clientContext != null)
                        clientContext.Dispose();
                }
            }
            return dtGetReqForm;

        }