oh dear

mscorlib/System/MidpointRounding.cs

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+using System;
+using System.Runtime.InteropServices;
+using Cpp2IlInjected;
+
+namespace System
+{
+	/// <summary>Specifies how mathematical rounding methods should process a number that is midway between two numbers.</summary>
+	// Token: 0x02000118 RID: 280
+	[Token(Token = "0x2000118")]
+	[ComVisible(true)]
+	public enum MidpointRounding
+	{
+		/// <summary>When a number is halfway between two others, it is rounded toward the nearest even number.</summary>
+		// Token: 0x0400045E RID: 1118
+		[Token(Token = "0x400045E")]
+		ToEven,
+		/// <summary>When a number is halfway between two others, it is rounded toward the nearest number that is away from zero.</summary>
+		// Token: 0x0400045F RID: 1119
+		[Token(Token = "0x400045F")]
+		AwayFromZero
+	}
+}