WebClient卡住了

Question

我想问你为什么我的WebClient会在大约10个结果后停止？ 这是代码。

foreach (var player in game["fellowPlayers"])
{
    WebClient webC = new WebClient();
    TextBlock playerName = new TextBlock();
    playerName.Foreground = new SolidColorBrush(Color.FromArgb(255, 255, 205, 3));
    Thickness playerMargin = playerName.Margin;
    if (player["teamId"].ToString() == teamId)
    {
        playerMargin.Top = 180 + (30 * teamRedIndex);
        playerMargin.Left = 150;
        teamRedIndex++;
    } else
    {
        playerMargin.Top = 150 + (30 * teamBlueIndex);
        playerMargin.Left = 300;
        teamBlueIndex++;
    }
    playerName.Margin = playerMargin;
    matchGrid.Children.Add(playerName);

    webC.DownloadStringCompleted += new DownloadStringCompletedEventHandler(playerLoad);
    loadPlayer(webC, player["summonerId"].ToString(), playerName);
}

我想得到~50个结果（我的意思是game["fellowPlayers"]的数量是〜50）。