public void Search(string searchText)
    {
        ClientContext clientContext = new ClientContext("mySite");


            SP.List oList = clientContext.Web.Lists.GetByTitle("myList");

            SP.CamlQuery camlQuery = new SP.CamlQuery();
            camlQuery.ViewXml = @"<Query><Where><Eq><FieldRef Name='searchColum' /><Value Type='valType'>" + searchText + "</Value></Eq></Where></Query>";
            SP.ListItemCollection listItemColl = oList.GetItems(camlQuery);
            clientContext.Load(listItemColl);
            clientContext.ExecuteQuery();
            //Convert listItemColl to dataTable and bind grid

}