using DicomObjects;
using DicomObjects.DicomUIDs;
            	    
/* 
 * If you use:
 * using (var cn = new DicomAssociation()) 
 * {
 *       ...
 * }
 * then the using block will automatically call cn.Dispose() at the end   
 */
   var cn = new DicomAssociation();  
   cn.RequestedContexts.Add(SOPClasses.Verification);
   cn.Open("localhost", 104, "callingAET", "calledAET");
   cn.Echo();  
   
   // Dispose() performs Close() internally, so there's no need to call Close() separately
   cn.Dispose();