oh dear

mscorlib/System/Threading/Tasks/TaskCanceledException.cs

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+using System;
+using System.Runtime.Serialization;
+using Cpp2IlInjected;
+
+namespace System.Threading.Tasks
+{
+	/// <summary>Represents an exception used to communicate task cancellation.</summary>
+	// Token: 0x02000383 RID: 899
+	[Token(Token = "0x2000383")]
+	[Serializable]
+	public class TaskCanceledException : OperationCanceledException
+	{
+		/// <summary>Initializes a new instance of the <see cref="T:System.Threading.Tasks.TaskCanceledException" /> class with a system-supplied message that describes the error.</summary>
+		// Token: 0x06001FB4 RID: 8116 RVA: 0x00002050 File Offset: 0x00000250
+		[Token(Token = "0x6001FB4")]
+		[Address(RVA = "0x1D9BAC0", Offset = "0x1D9A8C0", VA = "0x181D9BAC0")]
+		public TaskCanceledException()
+		{
+		}
+
+		/// <summary>Initializes a new instance of the <see cref="T:System.Threading.Tasks.TaskCanceledException" /> class with a reference to the <see cref="T:System.Threading.Tasks.Task" /> that has been canceled.</summary>
+		/// <param name="task">A task that has been canceled.</param>
+		// Token: 0x06001FB5 RID: 8117 RVA: 0x00002050 File Offset: 0x00000250
+		[Token(Token = "0x6001FB5")]
+		[Address(RVA = "0x1D9BB10", Offset = "0x1D9A910", VA = "0x181D9BB10")]
+		public TaskCanceledException(Task task)
+		{
+		}
+
+		/// <summary>Initializes a new instance of the <see cref="T:System.Threading.Tasks.TaskCanceledException" /> class with serialized data.</summary>
+		/// <param name="info">The object that holds the serialized object data.</param>
+		/// <param name="context">The contextual information about the source or destination.</param>
+		// Token: 0x06001FB6 RID: 8118 RVA: 0x00002050 File Offset: 0x00000250
+		[Token(Token = "0x6001FB6")]
+		[Address(RVA = "0x4E7140", Offset = "0x4E5F40", VA = "0x1804E7140")]
+		protected TaskCanceledException(SerializationInfo info, StreamingContext context)
+		{
+		}
+
+		// Token: 0x0400122E RID: 4654
+		[FieldOffset(Offset = "0x90")]
+		[Token(Token = "0x400122E")]
+		[NonSerialized]
+		private Task m_canceledTask;
+	}
+}