Removes all the elements from the target collection that are contained in the source collection. - CSharp System.Collections.Generic

CSharp examples for System.Collections.Generic:ICollection

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Description

Removes all the elements from the target collection that are contained in the source collection.

Demo Code

/*/*from  w  w w. j av  a2 s. c o  m*/
 * Copyright ? 2002-2011 the original author or authors.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
using System.Reflection;
using System.Collections.Generic;
using System.Collections;
using System;

public class Main{
        /// <summary>
      /// Removes all the elements from the target collection that are contained in the source collection.
      /// </summary>
      /// <param name="targetCollection">Collection where the elements will be removed.</param>
      /// <param name="sourceCollection">Elements to remove from the target collection.</param>
        public static void RemoveAll<T>(ICollection<T> targetCollection, ICollection<T> sourceCollection)
        {
            if (targetCollection == null)
            {
                throw new ArgumentNullException("targetCollection", "Collection cannot be null.");
            }

            if (sourceCollection == null)
            {
                throw new ArgumentNullException("sourceCollection", "Collection cannot be null.");
            }
            foreach (T element in sourceCollection)
            {
                if (targetCollection.Contains(element))
                {
                    targetCollection.Remove(element); 
                }
            }
        }
        /// <summary>
      /// Determines whether the <paramref name="collection"/> contains the specified <paramref name="element"/>.
      /// </summary>
      /// <param name="collection">The collection to check.</param>
      /// <param name="element">The object to locate in the collection.</param>
      /// <returns><see lang="true"/> if the element is in the collection, <see lang="false"/> otherwise.</returns>
      public static bool Contains<T>(ICollection<T> collection, Object element)
      {
         if (collection == null)
         {
            throw new ArgumentNullException("Collection cannot be null.");
         }
         MethodInfo method;
         method = collection.GetType().GetMethod("contains", BindingFlags.IgnoreCase | BindingFlags.Instance | BindingFlags.Static | BindingFlags.Public);
         if (null == method)
         {
            throw new InvalidOperationException("Collection type " + collection.GetType() + " does not implement a Contains() method.");
         }
         return (bool) method.Invoke(collection, new Object[] {element});
      }
}

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