Create Subfolder in SharePoint Document Library using CSOM

This short article and code snippet shows you how to create a subfolder in SharePoint Document Library using CSOM.

In the code below, this first folder you are going to add is folder name TopFolder.

var newFolder = folders.Add(name);

You the utilize the newFolder object to add the subfolder, the subfolder name in this example is FolderInsideTopFolder.



Before that you must call ExecuteQuery or else SharePoint is going to return you context not initialize error.


You can copy and paste the code below to any method. Of course your need to point to your own SharePoint website. 

string siteUrl =”;


ClientContext clientContext = new ClientContext(siteUrl);

SecureString securePassword = Login.GetPassword();


clientContext.Credentials = new SharePointOnlineCredentials(“”, securePassword);


Web rootWeb = clientContext.Web;


//Get List

var query = clientContext.LoadQuery(rootWeb.Lists.Where(p => p.Title == @”Documents”));



List list = query.FirstOrDefault();

string[] namesArray = new string[] { @”TopFolder”};


foreach (string name in namesArray)


    //Add Folder

    var folders = list.RootFolder.Folders;




    var newFolder = folders.Add(name);











//Execute request


You can also download a single solution from!APSVW40LeSD8gjk.


About chanmingman

Since March 2011 Microsoft Live Spaces migrated to Wordpress ( till now, I have is over 1 million viewers. This blog is about more than 50% telling you how to resolve error messages, especial for Microsoft products. The blog also has a lot of guidance teaching you how to get stated certain Microsoft technologies. The blog also uses as a help to keep my memory. The blog is never meant to give people consulting services or silver bullet solutions. It is a contribution to the community. Thanks for your support over the years. Ming Man is Microsoft MVP since year 2006. He is a software development manager for a multinational company. With 25 years of experience in the IT field, he has developed system using Clipper, COBOL, VB5, VB6, VB.NET, Java and C #. He has been using Visual Studio (.NET) since the Beta back in year 2000. He and the team have developed many projects using .NET platform such as SCM, and HR based applications. He is familiar with the N-Tier design of business application and is also an expert with database experience in MS SQL, Oracle and AS 400.
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