update RealOSType check

Pilz/Runtime/RuntimeInformationsEx.vb

@@ -30,28 +30,45 @@ Namespace Runtime
             Get
                 Static t As OSType? = Nothing
 
-                If t Is Nothing Then
-                    Dim windir As String = Environment.GetEnvironmentVariable("windir")
+				If t Is Nothing Then
 
-                    If Not String.IsNullOrEmpty(windir) AndAlso windir.Contains("\") AndAlso Directory.Exists(windir) Then
-                        t = OSType.Windows
-                    ElseIf File.Exists("/proc/sys/kernel/ostype") Then
-                        Dim osTypeString As String = File.ReadAllText("/proc/sys/kernel/ostype")
-                        If osTypeString.StartsWith("Linux", StringComparison.OrdinalIgnoreCase) Then
-                            ' Note: Android gets here too
-                            t = OSType.Linux
-                        Else
-                            t = OSType.Unknown
-                        End If
-                    ElseIf File.Exists("/System/Library/CoreServices/SystemVersion.plist") Then
-                        ' Note: iOS gets here too
-                        t = OSType.OSX
-                    Else
-                        t = OSType.Unknown
-                    End If
-                End If
+					Dim windir = Environment.GetEnvironmentVariable("windir")
+					Dim ostypeDirWine = "Z:\proc\sys\kernel\ostype"
+					Dim ostypeDirNative = "/proc/sys/kernel/ostype"
+					Dim systemVersionWine = "Z:\System\Library\CoreServices\SystemVersion.plist"
+					Dim systemVersionNative = "/System/Library/CoreServices/SystemVersion.plist"
 
-                Return t
+					If File.Exists(ostypeDirWine) Then ' Linux using wine
+						Dim osTypeString As String = File.ReadAllText(ostypeDirWine)
+						If osTypeString.StartsWith("Linux", StringComparison.OrdinalIgnoreCase) Then
+							' Note: Android gets here too
+							t = OSType.Linux
+						Else
+							t = OSType.Unknown
+						End If
+					ElseIf File.Exists(ostypeDirNative) Then ' Linux native
+						Dim osTypeString As String = File.ReadAllText(ostypeDirNative)
+						If osTypeString.StartsWith("Linux", StringComparison.OrdinalIgnoreCase) Then
+							' Note: Android gets here too
+							t = OSType.Linux
+						Else
+							t = OSType.Unknown
+						End If
+					ElseIf File.Exists(systemVersionWine) Then ' OSX using wine
+						' Note: iOS gets here too
+						t = OSType.OSX
+					ElseIf File.Exists(systemVersionNative) Then ' OSX native
+						' Note: iOS gets here too
+						t = OSType.OSX
+					ElseIf Not String.IsNullOrEmpty(windir) AndAlso Directory.Exists(windir) AndAlso Path.DirectorySeparatorChar = "\"c Then ' Windows
+						t = OSType.Windows
+					Else
+						t = OSType.Unknown
+					End If
+
+				End If
+
+				Return t
             End Get
         End Property