using System;
using System.Globalization;
using System.Windows.Forms;
 
namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
 
            var culture = CultureInfo.GetCultureInfo("ja-JP");
 
            this.textBox1.AppendText("小文字->大文字の順に変換したら違う文字になったもの\r\n");
            hoge(0x0000, 0xD7FF, (s) => s.ToLower(culture), (s) => s.ToUpper(culture));
            hoge(0xE000, 0xFFFF, (s) => s.ToLower(culture), (s) => s.ToUpper(culture));
 
            this.textBox1.AppendText("大文字->小文字の順に変換したら違う文字になったもの\r\n");
            hoge(0x0000, 0xD7FF, (s) => s.ToUpper(culture), (s) => s.ToLower(culture));
            hoge(0xE000, 0xFFFF, (s) => s.ToUpper(culture), (s) => s.ToLower(culture));
        }
 
        void hoge(int start, int end, Func<string, string> conv1, Func<string, string> conv2)
        {
            for (int code = start; code <= end; code++)
            {
                var s = new string((char)code, 1);
                var c1 = conv1(s);
                var c2 = conv2(c1);
 
                if (s != c2 && s != c1)
                {
                    textBox1.AppendText(string.Format("元の文字:{0}(U+{1:X4})->{2}(U+{3:X4})->{4}(U+{5:X4})\r\n", s, (int)s[0], c1, (int)c1[0], c2, (int)c2[0]));
                }
            }
        }
    }
}
 

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