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86 lines
3.6 KiB
86 lines
3.6 KiB
5 years ago
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#if NET20 || NET30 || NET35 || !NET_4_6
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// Licensed to the .NET Foundation under one or more agreements.
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// The .NET Foundation licenses this file to you under the MIT license.
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// See the LICENSE file in the project root for more information.
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using System.Runtime.Serialization;
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namespace System.Threading.Tasks
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{
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/// <summary>
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/// Represents an exception used to communicate task cancellation.
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/// </summary>
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[Serializable]
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internal class TaskCanceledException : LinqInternal.Core.NewOperationCanceledException
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{
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[NonSerialized]
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private readonly Task _canceledTask; // The task which has been canceled.
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/// <summary>
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/// Initializes a new instance of the <see cref="T:System.Threading.Tasks.TaskCanceledException"/> class.
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/// </summary>
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public TaskCanceledException() : base("A task was canceled")
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{
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// Empty
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}
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/// <summary>
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/// Initializes a new instance of the <see cref="T:System.Threading.Tasks.TaskCanceledException"/>
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/// class with a specified error message.
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/// </summary>
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/// <param name="message">The error message that explains the reason for the exception.</param>
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public TaskCanceledException(string message) : base(message)
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{
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// Empty
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}
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/// <summary>
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/// Initializes a new instance of the <see cref="T:System.Threading.Tasks.TaskCanceledException"/>
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/// class with a specified error message and a reference to the inner exception that is the cause of
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/// this exception.
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/// </summary>
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/// <param name="message">The error message that explains the reason for the exception.</param>
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/// <param name="innerException">The exception that is the cause of the current exception.</param>
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public TaskCanceledException(string message, Exception innerException) : base(message, innerException)
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{
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}
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/// <summary>
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/// Initializes a new instance of the <see cref="T:System.Threading.Tasks.TaskCanceledException"/> class
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/// with a reference to the <see cref="T:System.Threading.Tasks.Task"/> that has been canceled.
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/// </summary>
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/// <param name="task">A task that has been canceled.</param>
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public TaskCanceledException(Task task) :
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base("A task was canceled", task != null ? task.CancellationToken : new CancellationToken())
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{
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_canceledTask = task;
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}
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/// <summary>
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/// Initializes a new instance of the <see cref="T:System.Threading.Tasks.TaskCanceledException"/>
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/// class with serialized data.
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/// </summary>
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/// <param name="info">The <see cref="T:System.Runtime.Serialization.SerializationInfo"/> that holds the serialized object data about the exception being thrown.</param>
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/// <param name="context">The <see cref="T:System.Runtime.Serialization.StreamingContext"/> that contains contextual information about the source or destination. </param>
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protected TaskCanceledException(SerializationInfo info, StreamingContext context) : base(info, context)
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{
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// Empty
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}
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/// <summary>
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/// Gets the task associated with this exception.
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/// </summary>
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/// <remarks>
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/// It is permissible for no Task to be associated with a
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/// <see cref="T:System.Threading.Tasks.TaskCanceledException"/>, in which case
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/// this property will return null.
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/// </remarks>
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public Task Task
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{
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get { return _canceledTask; }
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}
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}
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}
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#endif
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