string before = 1000.ToString("C");

Console.WriteLine("元データ： {0}", before);

var numberFotmat = System.Globalization.CultureInfo.CurrentCulture.NumberFormat;

string yen = numberFotmat.CurrencySymbol;

string comma = numberFotmat.CurrencyGroupSeparator;

string after = before.Replace(yen, "").Replace(comma, "");

Console.WriteLine("{0} → {1}",before, after);



char c1 = '\\'; 

char c2 = yen[0];

Console.ReadKey();