ICU の u_getNumericValue 呼び出し

u_getNumericValue.cs

using System;
using System.Runtime.InteropServices;

public class Program
{
    [DllImport("icuuc.dll")]
    public static extern double u_getNumericValue(int c);

    static void Main()
    {
        Console.WriteLine(u_getNumericValue('Ⅱ'));
        Console.WriteLine(u_getNumericValue('ⅱ'));
        Console.WriteLine(u_getNumericValue('٢'));
        Console.WriteLine(u_getNumericValue('二'));
    }
}