//引入命名空间
using System;
using System.Web.Services.Description;
using System.Collections;

class MyFormatExtension : ServiceDescriptionFormatExtension 
{
   public MyFormatExtension()
   {
      // Set the properties.
      this.Handled  = true;
      this.Required = true;
   }
}
class myCollectionSample
{
   static void Main()
   {
      try
      {
         ServiceDescription myServiceDescription = 
            ServiceDescription.Read("Sample_CS.wsdl");
         ServiceDescriptionFormatExtensionCollection  myCollection = 
            new ServiceDescriptionFormatExtensionCollection(myServiceDescription);
         SoapBinding mySoapBinding1 = new SoapBinding();
         SoapBinding mySoapBinding2 = new SoapBinding();
         SoapAddressBinding mySoapAddressBinding = new SoapAddressBinding();
         MyFormatExtension  myFormatExtensionObject = new MyFormatExtension();
         // Add elements to collection.
         myCollection.Add(mySoapBinding1);
         myCollection.Add(mySoapAddressBinding);
         myCollection.Add(mySoapBinding2);
         myCollection.Add(myFormatExtensionObject);
         Console.WriteLine("Collection contains following types of elements: ");
         // Display the 'Type' of the elements in collection.
         for(int i = 0;i< myCollection.Count;i++) 
         {
            Console.WriteLine(myCollection[i].GetType().ToString()); 
         }
         // Check element of type 'SoapAddressBinding' in collection.
         Object   myObj = myCollection.Find(mySoapAddressBinding.GetType());
         if(myObj == null)
         {
            Console.WriteLine("Element of type '{0}' not found in collection.",
               mySoapAddressBinding.GetType().ToString());
         }
         else
         {
            Console.WriteLine("Element of type '{0}' found in collection.",
               mySoapAddressBinding.GetType().ToString());
         }
         // Check all elements of type 'SoapBinding' in collection.
         Object[] myObjectArray1 = new Object[myCollection.Count];
         myObjectArray1 = myCollection.FindAll(mySoapBinding1.GetType());
         int myNumberOfElements = 0;
         IEnumerator myIEnumerator  = myObjectArray1.GetEnumerator();
         
         // Calculate number of elements of type 'SoapBinding'.
         while(myIEnumerator.MoveNext())
         {
            if(mySoapBinding1.GetType() == myIEnumerator.Current.GetType())
               myNumberOfElements++;
         }
         Console.WriteLine("Collection contains {0} objects of type '{1}'.", 
                           myNumberOfElements.ToString(),
                           mySoapBinding1.GetType().ToString());
         // Check 'IsHandled' status for 'myFormatExtensionObject' object in collection.
         Console.WriteLine("'IsHandled' status for {0} object is {1}.",
                  myFormatExtensionObject.ToString(), 
                  myCollection.IsHandled(myFormatExtensionObject).ToString());
         // Check 'IsRequired' status for 'myFormatExtensionObject' object in collection.
         Console.WriteLine("'IsRequired' status for {0} object is {1}.",
                  myFormatExtensionObject.ToString(),
                  myCollection.IsRequired(myFormatExtensionObject).ToString());
         // Copy elements of collection to an Object array.
         Object[] myObjectArray2 = new Object[myCollection.Count];
         myCollection.CopyTo(myObjectArray2,0);
         Console.WriteLine("Collection elements are copied to an object array.");
         // Check for 'myFormatExtension' object in collection.
         if(myCollection.Contains(myFormatExtensionObject))
         {
            // Get index of a 'myFormatExtension' object in collection.
            Console.WriteLine("Index of 'myFormatExtensionObject' is "+
               "{0} in collection.",
               myCollection.IndexOf(myFormatExtensionObject).ToString());
            // Remove 'myFormatExtensionObject' element from collection.
            myCollection.Remove(myFormatExtensionObject);
            Console.WriteLine("'myFormatExtensionObject' is removed"+
                              " from collection.");
         }
         // Insert 'MyFormatExtension' object.
         myCollection.Insert(0,myFormatExtensionObject);
         Console.WriteLine("'myFormatExtensionObject' is inserted to collection.");
      }
      catch(Exception e)
      {
         Console.WriteLine("The following exception was raised: {0}", e.Message);
      }
   }
}