Read All the files (including Sub Folder) in a List

Read the required list item directly using CAML query. You can search for a list item inside folders by setting Scope attribute to Recursive as follows:

        SPWeb web = SPContext.Current.Web;

        SPList list = web.Lists["Shared Documents"];

        string content = string.Empty;

           

        SPQuery query = new SPQuery();

        query.ViewAttributes = "Scope=\"Recursive\"";

        query.Query = "<Where><Eq><FieldRef Name='FileLeafRef' />

            <Value Type='File'>NewProcess.js</Value></Eq></Where>";

        SPListItemCollection items = list.GetItems(query);

        SPListItem item = items[0];