高手帮忙弄个正则解决办法

高手帮忙弄个正则
有个string，里面格式如下：

from:XXXX
to:XXXX
msg:XXXXXXXXXXXX
怎么用正则取出：后面的？

谢谢

[解决办法]
try

string yourStr = ............;
MatchCollection mc = Regex.Matches(yourStr, @ "(? <=:).* ");
foreach (Match m in mc)
{
richTextBox2.Text += m.Value + "\n ";
}