Using Pango in C#: encoding problem

Hello!

I'm trying to use Pango in C# (MS Visual Studio), but cannot figure out
how to convert C# strings to the native Pango format (char*) and vice
versa. The non-unicode letters are drawn without problems, but when I
try to put some unicode text, the output is unreadable.

First of all, I confirmed that pango and cairo are working well. For
this I got the sample string with pango_language_get_sample_string and
put it in pango_layout_set_text. It was perfect for any language. But
when I try to convert it to the C# string, I get only unreadable mess.

Below is the code. Would someone tell me where I was wrong?

[DllImport("libpango-1.0-0.dll", CharSet = CharSet.Ansi)]
public static extern IntPtr pango_language_get_sample_string(IntPtr
language);

/* Some code here */

IntPtr samplePointer =
PangoCairo.NativeMethods.pango_language_get_sample_string(myLang);
string outputStr = Marshal.PtrToStringAnsi(samplePointer);

When I use Unicode instead of Ansi, the result becomes even worse...

Thanks for any help.

Evgeny