ช่วยผมนับจำนวน character หน่อยครับ คิดขึ้นมาขำๆ แต่แอบลืมไปแล้ว

    // string word = "AAABBCDEFFFFFGGHHIIIIIIIIII";

    publicvoid CountChar(string word)
    {
        string result = string.Empty;

        (from c in word.ToCharArray()
         group c by c into g
         select new
         {
            chr = g.Key,
            count = g.Count()
         }).ToList().ForEach(c => result = string.Format("{0}{1}{2}", result, c.chr.ToString(), c.count.ToString()));

        return result;
    }

// string word = "dfgghgsafsadgdfklgjsdiavjkjerljj";

public string CountChar(string word)
{
    string result = string.Empty;

    (from c in word.ToCharArray()
     group c by c into g
     select new
     {
        chr = g.Key,
        count = g.Count()
     }).ToList().ForEach(c => result = string.Format("{0}{1}{2}", result, c.chr.ToString(), c.count.ToString()));

    return result;
}

        (from c in word.ToCharArray()
         group c by c into g
         orderby g.Key
         select new
         {
             chr = g.Key,
             count = g.Count()
         }).ToList().ForEach(c => result = string.Format("{0}{1}{2}", result, c.chr.ToString(), c.count.ToString()));