Progrmatically set Lookup Field Value in a SharePoint List using CSOM

Programmatically set Lookup Field Value in a SharePoint List using CSOM

 List> data = new List>();
                                    data = GetLookupIDFromList(clientContext, "Account", "AccountID", "Some Value");
ListItemCreationInformation itemCreateInfo = new ListItemCreationInformation();
                                    ListItem newItem = oList.AddItem(itemCreateInfo);
                                    newItem["Title"] = row.Field(0);
                                    newItem["OpportunityName"] = row.Field(1);
                                    if (data != null)
                                    {
                                        FieldLookupValue fld = new FieldLookupValue() { LookupId = int.Parse(data[0].Key) };
                                        if (int.Parse(data[0].Key) > 0)
                                        {
                                            newItem["AccountID"] = fld.LookupId;
                                            newItem["AccountName"] = fld.LookupId;
                                        }
                                    }



   public static List> GetLookupIDFromList(ClientContext context, string listname, string strLookupColumnName, string strLookupValue)
        {
            try
            {
                List> data = new List>();
                List list = context.Web.Lists.GetByTitle(listname);
                //string strCAMLQuery = "" + strLookupValue + "";
                string strCAMLQuery = "" +
                                   "" +
                                      "" +
                                         "" +
                                         "" + strLookupValue + "" +
                                      "" +
                                   "" +
                                "";
                //If you are developing console application, use 
                // System.Web.HttpUtility.HtmlEncode(strLookupValue) instead of
                //System.Web.HttpContext.Current.Server.HtmlEncode(strLookupValue)
                CamlQuery query = new CamlQuery();
                query.ViewXml = @"" + strCAMLQuery + "";
                ListItemCollection items = list.GetItems(query);
                context.Load(items);
                context.ExecuteQuery();
                if (items.Count > 0)
                {
                    // int iRet = items[0].Id;
                    data.Add(new KeyValuePair(items[0].Id.ToString(), items[0].FieldValues["AccountName"].ToString()));
                    return data;
                }
                else
                {
                    return null;
                }
            }
            catch (Exception ex)
            {
                return null;
            }
        }