Update Files

Kha/Backends/WPF/system/io/Directory.hx

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+package system.io;
+
+@:native("System.IO.Directory")
+extern class Directory {
+	public static function CreateDirectory(path: String): DirectoryInfo;
+}

Kha/Backends/WPF/system/io/DirectoryInfo.hx

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+package system.io;
+
+@:native("System.IO.DirectoryInfo")
+extern class DirectoryInfo {}

Kha/Backends/WPF/system/io/File.hx

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+package system.io;
+
+import haxe.io.BytesData;
+
+@:native("System.IO.File")
+extern class File {
+	public static function AppendAllText(path: String, contents: String): Void;
+	public static function ReadAllText(filename: String): String;
+	public static function WriteAllText(path: String, contents: String): Void;
+	public static function ReadAllBytes(path: String): BytesData;
+	public static function WriteAllBytes(path: String, bytes: BytesData): Void;
+	public static function Exists(path: String): Bool;
+}

Kha/Backends/WPF/system/io/Path.hx

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+package system.io;
+
+@:native("System.IO.Path")
+extern class Path {
+	public static function GetFullPath(path: String): String;
+}