O365 - CSOM upload large files

uploadfilelarge.cs

var spContext = SharePointContextProvider.Current.GetSharePointContext(HttpContext, SPHostUrl);

using (var clientContext = spContext.CreateUserClientContextForSPAppWeb())
{
    if (clientContext != null)
    {
        //file is uploaded file. Could be read from Request.Files
        using (FileStream fs = new FileStream(file.FileName, FileMode.Open))
        {
            //code for file size > 2MB. tested upto 50MB
            FileCreationInformation newFile = new FileCreationInformation();
            newFile.ContentStream = fs;
            newFile.Url = Path.GetFileName(file.FileName);
            newFile.Overwrite = true;
            
            List docs = clientContext.Web.Lists.GetByTitle("List_Name");
            Microsoft.SharePoint.Client.File uploadFile = docs.RootFolder.Files.Add(newFile);
            clientContext.Load(uploadFile);
            clientContext.ExecuteQuery();
        }
    }
}