string str = "reterry[VeVB.COm]是武林網[VeVB.COm]的站長";
string[] arrstr = str.Split(new char[] { '[', 's', 'o', 's', 'u', 'o', '8', '.', 'c', 'o', 'm', ']' });
for (int i = 0; i < arrstr.Length; i++)
{
Response.Write(arrstr[i]);
}

string[] arrstr2 = str.Replace("[VeVB.COm]", "$").Split('$');