怎么让它显示未读邮件数目

/// <summary>
/// 这个函数用来显示新邮件数信息
/// </summary>
public void Stat()
{

WriteToNetStream(ref netStream, "STAT");

string returnMsg=ReadFromNetStream(ref netStream);
checkForError(returnMsg);

//将总邮件数和邮件大小分离
string[] TotalStat= returnMsg.Split(new char[] {' '});

int count =Int32.Parse(TotalStat[1]);
int totalSize=Int32.Parse(TotalStat[2]);

//调用精灵，告知用户新邮件数
Form2 myForm = new Form2 (count,Username.Text,Password.Text);

myForm.Show();
}
但是这个显示的是总的邮件数目！怎么让它显示未读邮件数目