RemoveFromCollection.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / cdf / src / NetFx40 / System.Activities / System / Activities / Statements / RemoveFromCollection.cs / 1305376 / RemoveFromCollection.cs
                        

                        
                            //------------------------------------------------------------------------------ 
// Copyright (c) Microsoft Corporation.  All rights reserved.
//-----------------------------------------------------------------------------

namespace System.Activities.Statements 
{
    using System; 
    using System.Collections.Generic; 
    using System.ComponentModel;
    using System.Windows.Markup; 
    using System.Diagnostics.CodeAnalysis;
    using System.Runtime;
    using System.Collections.ObjectModel;
 
    [SuppressMessage(FxCop.Category.Naming, FxCop.Rule.IdentifiersShouldNotHaveIncorrectSuffix, Justification = "Optimizing for XAML naming.")]
    [ContentProperty("Collection")] 
    public sealed class RemoveFromCollection : CodeActivity 
    {
        [RequiredArgument] 
        [DefaultValue(null)]
        public InArgument> Collection
        {
            get; 
            set;
        } 
 
        [RequiredArgument]
        [DefaultValue(null)] 
        public InArgument Item
        {
            get;
            set; 
        }
 
 
        protected override void CacheMetadata(CodeActivityMetadata metadata)
        { 
            RuntimeArgument collectionArgument = new RuntimeArgument("Collection", typeof(ICollection), ArgumentDirection.In, true);
            metadata.Bind(this.Collection, collectionArgument);

            RuntimeArgument itemArgument = new RuntimeArgument("Item", typeof(T), ArgumentDirection.In, true); 
            metadata.Bind(this.Item, itemArgument);
 
            RuntimeArgument resultArgument = new RuntimeArgument("Result", typeof(bool), ArgumentDirection.Out); 
            metadata.Bind(this.Result, resultArgument);
 
            metadata.SetArgumentsCollection(
                new Collection
                {
                    collectionArgument, 
                    itemArgument,
                    resultArgument 
                }); 
        }
 
        protected override bool Execute(CodeActivityContext context)
        {
            ICollection collection = this.Collection.Get(context);
            if (collection == null) 
            {
                throw FxTrace.Exception.AsError(new InvalidOperationException(SR.CollectionActivityRequiresCollection(this.DisplayName))); 
            } 
            T item = this.Item.Get(context);
 
            return collection.Remove(item);
        }
    }
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.

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