Fix NotImplementedException when using shift-jis encoding

BepInEx/Console/ConsoleManager.cs

@@ -9,6 +9,8 @@ namespace BepInEx
 {
 	public static class ConsoleManager
 	{
+		private const uint SHIFT_JIS_CP = 932;
+		
 		internal static IConsoleDriver Driver { get; set; }
 
 		/// <summary>
@@ -79,22 +81,22 @@ namespace BepInEx
 
 		public static void SetConsoleEncoding()
 		{
-			// Apparently Windows code-pages work in Mono.
-			// https://stackoverflow.com/a/33456543
-			// Alternatively we can pass in "shift-jis"
-			var encoding = ConfigConsoleShiftJis.Value ? Encoding.GetEncoding(932): new UTF8Encoding(false);
+			// Apparently some versions of Mono throw a "Encoding name 'xxx' not supported"
+			// if you use Encoding.GetEncoding
+			// That's why we use of codepages directly and handle then in console drivers separately
+			var codepage = ConfigConsoleShiftJis.Value ? SHIFT_JIS_CP: (uint)Encoding.UTF8.CodePage;
 
-			SetConsoleEncoding(encoding);
+			SetConsoleEncoding(codepage);
 		}
 
-		public static void SetConsoleEncoding(Encoding encoding)
+		public static void SetConsoleEncoding(uint codepage)
 		{
 			if (!ConsoleActive)
 				throw new InvalidOperationException("Console is not currently active");
 
 			DriverCheck();
 
-			Driver.SetConsoleEncoding(encoding);
+			Driver.SetConsoleEncoding(codepage);
 		}
 
 		public static void SetConsoleTitle(string title)

BepInEx/Console/IConsoleDriver.cs

@@ -18,7 +18,10 @@ namespace BepInEx
 		void DetachConsole();
 
 		void SetConsoleColor(ConsoleColor color);
-		void SetConsoleEncoding(Encoding encoding);
+		
+		// Apparently Windows code-pages work in Mono.
+		// https://stackoverflow.com/a/33456543
+		void SetConsoleEncoding(uint codepage);
 		void SetConsoleTitle(string title);
 	}
 }

BepInEx/Console/Unix/LinuxConsoleDriver.cs

@@ -84,7 +84,7 @@ namespace BepInEx.Unix
 			}
 		}
 
-		public void SetConsoleEncoding(Encoding encoding)
+		public void SetConsoleEncoding(uint codepage)
 		{
 			// We shouldn't be changing this on Unix
 		}

BepInEx/Console/Windows/WindowsConsoleDriver.cs

@@ -62,10 +62,12 @@ namespace BepInEx
 			Kon.ForegroundColor = color;
 		}
 
-		public void SetConsoleEncoding(Encoding encoding)
+		public void SetConsoleEncoding(uint codepage)
 		{
-			ConsoleEncoding.ConsoleCodePage = (uint)encoding.CodePage;
-			Console.OutputEncoding = encoding;
+			// Make sure of ConsoleEncoding helper class because on some Monos
+			// Encoding.GetEncoding throws NotImplementedException on most codepages
+			ConsoleEncoding.ConsoleCodePage = codepage;
+			Console.OutputEncoding = ConsoleEncoding.GetEncoding(codepage);
 		}
 
 		public void SetConsoleTitle(string title)