oh dear

mscorlib/System/Runtime/Serialization/OnDeserializedAttribute.cs

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+using System;
+using System.Runtime.InteropServices;
+using Cpp2IlInjected;
+
+namespace System.Runtime.Serialization
+{
+	/// <summary>When applied to a method, specifies that the method is called immediately after deserialization of an object in an object graph. The order of deserialization relative to other objects in the graph is non-deterministic.</summary>
+	// Token: 0x02000455 RID: 1109
+	[Token(Token = "0x2000455")]
+	[ComVisible(true)]
+	[AttributeUsage(AttributeTargets.Method)]
+	public sealed class OnDeserializedAttribute : Attribute
+	{
+		/// <summary>Initializes a new instance of the <see cref="T:System.Runtime.Serialization.OnDeserializedAttribute" /> class.</summary>
+		// Token: 0x0600250A RID: 9482 RVA: 0x00002050 File Offset: 0x00000250
+		[Token(Token = "0x600250A")]
+		[Address(RVA = "0x4093D0", Offset = "0x4081D0", VA = "0x1804093D0")]
+		public OnDeserializedAttribute()
+		{
+		}
+	}
+}