Client Object Model is introduced in SharePoint Foundation 2010, and does not require SharePoint Server 2010 to be installed. This is a new object model introduced in SharePoint 2010 which is aimed at making things easier for the developer when developing client-side applications for SharePoint 2010.

Let’s we take a look how to create a client side application using Client Object Model through C# programming language in .NET:

• Go to Visual Studio 2010.
• Go to File � New � Project.
• Select Windows Application and apply the following settings to your project:
  Target Framework: .NET 3.5
   Build output: AnyCpu (or x64)
• Click Add.

Next, we need to add references to the Client Object Model in order to be able to work with the client-side APIs from our Windows Application.

Right click the “References” node and choose “Add Reference”  

·     Choose Browse:

·         Go to the following location: C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\14\ISAPI.

·         Select these two files:

Microsoft.SharePoint.Client.dll

Microsoft.SharePoint.Client.Runtime.dll

Add the following controls in your Windows Application Form:

·         A new ListBox control

·         A new Button control

After adding controls add the following code in the Form1.cs file:

using System;
using System.Text;
using System.Windows.Forms;
using SharePoint = Microsoft.SharePoint.Client;
 
namespace SampleApplication
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        private void btnDispList_Click(object sender, EventArgs e)
        {
            listBox1.Items.Clear();
            using (SharePoint.ClientContext objClientContext = new 
                                        SharePoint.                                        SharePoint.ClientContext("http://rohit:34143/"))
            {
                var objWeb = objClientContext.Web;
                objClientContext.Load(objWeb);
                objClientContext.Load(objWeb.Lists);
                objClientContext.ExecuteQuery();
                foreach (SharePoint.List objlist in objWeb.Lists)
                {
                    listBox1.Items.Add(objlist.Title);
                }
            }
        }
    }
}
 

When you run this application and click on button (Display List) it will look something like this: 

Thanks for reading this article. I think this will help you a lot when you create your first Client Object Model application to access SharePoint server in C#.