How to automatically save attachment of Outlook in our PC using C#.net application

 Add reference, Microsoft.Office.Interop.Outlook.

 using OutlookApplication = Microsoft.Office.Interop.Outlook;

 OutlookApplication._Application olApp = new OutlookApp.ApplicationClass();
 OutlookApplication._NameSpace olNS = olApp.GetNamespace("MAPI");

 olNS.Logon("your default outlook profile name", Missing.Value, false, false);
 OutlookApplication._SyncObject _syncObject = null;
 _syncObject = olNS.SyncObjects[1];
 _syncObject.Start();

 System.Threading.Thread.Sleep(30000);

 _syncObject.Stop();
 _syncObject = null;

 Microsoft.Office.Interop.Outlook.MAPIFolder myInbox =  olNS.GetDefaultFolder(Microsoft.Office.Interop.Outlook.OlDefaultFolders.olFolderInbox);