oh dear

mscorlib/System/Runtime/CompilerServices/CustomConstantAttribute.cs

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+using System;
+using System.Runtime.InteropServices;
+using Cpp2IlInjected;
+
+namespace System.Runtime.CompilerServices
+{
+	/// <summary>Defines a constant value that a compiler can persist for a field or method parameter.</summary>
+	// Token: 0x02000554 RID: 1364
+	[Token(Token = "0x2000554")]
+	[AttributeUsage(AttributeTargets.Field | AttributeTargets.Parameter)]
+	[ComVisible(true)]
+	[Serializable]
+	public abstract class CustomConstantAttribute : Attribute
+	{
+		/// <summary>Gets the constant value stored by this attribute.</summary>
+		/// <returns>The constant value stored by this attribute.</returns>
+		// Token: 0x17000647 RID: 1607
+		// (get) Token: 0x06002A68 RID: 10856
+		[Token(Token = "0x17000647")]
+		public abstract object Value
+		{
+			[Token(Token = "0x6002A68")]
+			[Address(Slot = "7")]
+			get;
+		}
+
+		/// <summary>Initializes a new instance of the <see cref="T:System.Runtime.CompilerServices.CustomConstantAttribute" /> class.</summary>
+		// Token: 0x06002A69 RID: 10857 RVA: 0x00002050 File Offset: 0x00000250
+		[Token(Token = "0x6002A69")]
+		[Address(RVA = "0x4093D0", Offset = "0x4081D0", VA = "0x1804093D0")]
+		protected CustomConstantAttribute()
+		{
+		}
+	}
+}