#region 取得windows的所有进程
public static string GetCourse()
{
    System.Text.StringBuilder sb = new System.Text.StringBuilder();
    string tempName = "";
    int begpos, endpos;
    foreach (Process thisProc in System.Diagnostics.Process.GetProcesses())
    {
        tempName = thisProc.ToString();
        begpos = tempName.IndexOf("(") + 1;
        endpos = tempName.IndexOf(")");
        tempName = tempName.Substring(begpos, endpos - begpos);
        sb.Append(tempName + "<br /> ");
    }
    return sb.ToString();
}
#endregion