50 lines
1.9 KiB
C#
50 lines
1.9 KiB
C#
//------------------------------------------------------------------------------
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// <copyright file="AsyncOperationManager.cs" company="Microsoft">
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// Copyright (c) Microsoft Corporation. All rights reserved.
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// </copyright>
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//------------------------------------------------------------------------------
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namespace System.ComponentModel
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{
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using System.Collections;
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using System.Threading;
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using System.Diagnostics;
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using System.Security.Permissions;
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[HostProtection(SharedState = true)]
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public static class AsyncOperationManager {
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public static AsyncOperation CreateOperation(object userSuppliedState) {
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return AsyncOperation.CreateOperation(userSuppliedState, SynchronizationContext);
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}
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/// <include file='doc\AsyncOperationManager.uex' path='docs/doc[@for="AsyncOperationManager.SynchronizationContext"]/*' />
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[EditorBrowsable(EditorBrowsableState.Advanced)]
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public static SynchronizationContext SynchronizationContext {
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get {
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if (SynchronizationContext.Current == null) {
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SynchronizationContext.SetSynchronizationContext(new SynchronizationContext());
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}
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return SynchronizationContext.Current;
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}
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#if SILVERLIGHT
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// a thread should set this to null when it is done, else the context will never be disposed/GC'd
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[SecurityCritical]
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[FriendAccessAllowed]
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internal set {
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SynchronizationContext.SetSynchronizationContext(value);
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}
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#else
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// a thread should set this to null when it is done, else the context will never be disposed/GC'd
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[PermissionSetAttribute(SecurityAction.LinkDemand, Name="FullTrust")]
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set {
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SynchronizationContext.SetSynchronizationContext(value);
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}
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#endif
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}
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}
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}
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