Programmatically enable Enterprise keywords in SharePoint 2010

Introduction: 

Enterprise keywords are used to tag the documents when uploading the documents in the document library. Enterprise documents can be enabled in both SharePoint lists and libraries. Enterprise keywords - Terms are stored in a non-hierarchical way and available for users to key in which is known as folksonomy (free tagging). In this article we will be seeing how to enable Enterprise keywords for a list using SharePoint object model.

Prerequisites:

1. Managed metadata service application should be configured. 
   
   
2. Web application should be associated to the Managed Metadata Service Application.

Programmatically Enable Enterprise Keywords:

To enable Enterprise keywords through UI refer http://www.c-sharpcorner.com/UploadFile/anavijai/7633.

To enable enterprise keywords using object model do the following steps:

• Open Visual Studio 2010. 
  
  
• Go to File => New => Project. 
  
  
• Select Console Application template from the installed templates. 
  
  
• Add the following references.
  
  Microsoft.SharePoint 
  
  
• Add the following namespaces.
  
  using Microsoft.SharePoint;
  
  
• Replace Program.cs with the following code.
  
  using System;
  using System.Collections.Generic;
  using System.Linq;
  using System.Text;
  using Microsoft.SharePoint;
  namespace EnterpriseKeywords
  {
      class Program
      {
          static void Main(string[] args)
          {
              using (SPSite site = new SPSite("http://serverName:22222/sites/Test/"))
              {
                  using (SPWeb web = site.OpenWeb("BL"))
                  {
                      SPList list = web.Lists.TryGetList("dl");
                      if (list != null)
                      {
                          SPField field = list.ParentWeb.AvailableFields["Enterprise Keywords"];
                          if (!list.Fields.ContainsField("Enterprise Keywords"))
                          {
                              list.Fields.Add(field);
                              list.Update();
                              Console.WriteLine(field.Title + " added successfully to the list");
                          }
                          else
                          {
                              Console.WriteLine(field.Title + " column already exists in the list");
                          }
                      }
                      else
                      {
                          Console.WriteLine(list.Title + " does not exists in the site");
                      }
                      Console.ReadLine();
                  }
              }
          }
      }
  }
  
  
• Build the solution.
  
  
• Hit F5.
  
  
• Go to the =>Permissions and Management => Enterprise Metadata and Keywords Settings.
  
  
• You could see the "Enterprise Keywords" enabled.