oh dear

mscorlib/System/Threading/ManualResetEvent.cs

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+using System;
+using System.Runtime.InteropServices;
+using Cpp2IlInjected;
+
+namespace System.Threading
+{
+	/// <summary>Notifies one or more waiting threads that an event has occurred. This class cannot be inherited.</summary>
+	// Token: 0x02000322 RID: 802
+	[Token(Token = "0x2000322")]
+	[ComVisible(true)]
+	public sealed class ManualResetEvent : EventWaitHandle
+	{
+		/// <summary>Initializes a new instance of the <see cref="T:System.Threading.ManualResetEvent" /> class with a Boolean value indicating whether to set the initial state to signaled.</summary>
+		/// <param name="initialState">
+		///   <see langword="true" /> to set the initial state signaled; <see langword="false" /> to set the initial state to nonsignaled.</param>
+		// Token: 0x06001D51 RID: 7505 RVA: 0x00002050 File Offset: 0x00000250
+		[Token(Token = "0x6001D51")]
+		[Address(RVA = "0x2923710", Offset = "0x2922510", VA = "0x182923710")]
+		public ManualResetEvent(bool initialState)
+		{
+		}
+	}
+}