unity 提取字符串数字修改后返回字符串

const string pattern = @"\d+";//表达1位或多位的整数数字  
 
 private void ChangeText()
    {
        for (int x = 0; x < content.Count; x++)
        {
            var a = Regex.Matches(content[x], pattern).Cast<Match>().Select(m => m.Index).ToArray();
            var b = Regex.Matches(content[x], pattern).Cast<Match>().Select(m => m.Value).ToArray();

            for (int y = 0; y < b.Length; y++)
            {
                b[y] = "<size="+size+">" + "<color=#"+colorNum+">" + b[y] + "</color>" + "</size>";
            }

            for (int z = a.Length - 1; z >= 0; z--)
            {
                string t1 = content[x].Substring(0, a[z]);
                string t2 = content[x].Substring(a[z] + 2, content[x].Length - a[z] - 2);
                content[x] = string.Format("{0}{1}{2}", t1, b[z], t2);
            }
        }
    }