oh dear

mscorlib/System/Text/EncodingProvider.cs

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+using System;
+using System.Runtime.InteropServices;
+using Cpp2IlInjected;
+
+namespace System.Text
+{
+	/// <summary>Provides the base class for an encoding provider, which supplies encodings that are unavailable on a particular platform.</summary>
+	// Token: 0x020001D9 RID: 473
+	[Token(Token = "0x20001D9")]
+	[ComVisible(true)]
+	public abstract class EncodingProvider
+	{
+		/// <summary>Returns the encoding with the specified name.</summary>
+		/// <param name="name">The name of the requested encoding.</param>
+		/// <returns>The encoding that is associated with the specified name, or <see langword="null" /> if this <see cref="T:System.Text.EncodingProvider" /> cannot return a valid encoding that corresponds to <paramref name="name" />.</returns>
+		// Token: 0x06001206 RID: 4614
+		[Token(Token = "0x6001206")]
+		[Address(Slot = "4")]
+		public abstract Encoding GetEncoding(string name);
+
+		/// <summary>Returns the encoding associated with the specified code page identifier.</summary>
+		/// <param name="codepage">The code page identifier of the requested encoding.</param>
+		/// <returns>The encoding that is associated with the specified code page, or <see langword="null" /> if this <see cref="T:System.Text.EncodingProvider" /> cannot return a valid encoding that corresponds to <paramref name="codepage" />.</returns>
+		// Token: 0x06001207 RID: 4615
+		[Token(Token = "0x6001207")]
+		[Address(Slot = "5")]
+		public abstract Encoding GetEncoding(int codepage);
+
+		// Token: 0x06001208 RID: 4616 RVA: 0x00002082 File Offset: 0x00000282
+		[Token(Token = "0x6001208")]
+		[Address(RVA = "0x2F1F540", Offset = "0x2F1E340", VA = "0x182F1F540")]
+		internal static Encoding GetEncodingFromProvider(int codepage)
+		{
+			return null;
+		}
+
+		// Token: 0x06001209 RID: 4617 RVA: 0x00002082 File Offset: 0x00000282
+		[Token(Token = "0x6001209")]
+		[Address(RVA = "0x2F1F430", Offset = "0x2F1E230", VA = "0x182F1F430")]
+		internal static Encoding GetEncodingFromProvider(string encodingName)
+		{
+			return null;
+		}
+
+		// Token: 0x04000969 RID: 2409
+		[Token(Token = "0x4000969")]
+		private static object s_InternalSyncObject;
+
+		// Token: 0x0400096A RID: 2410
+		[Token(Token = "0x400096A")]
+		private static EncodingProvider[] s_providers;
+	}
+}