C# windowsphone中的SQL查询表达式

我有一个DB-ScoreDB和table-scoredable，其中包含属性名称和分数。我想按降序显示分数：

t = from ScoreTable s in scoreDB.ScoreTable
                    orderby s.Score descending
                    select s;

行中的错误：

GameScoreCollection = new ObservableCollection<ScoreTable>(t);

表代码：

[Table]
public class ScoreTable : INotifyPropertyChanged, INotifyPropertyChanging
{       
    [Column(IsPrimaryKey = true, IsDbGenerated = true, DbType = "INT NOT NULL Identity", CanBeNull = false, AutoSync = AutoSync.OnInsert)]
  }

    private string _Name;

    [Column]
    public string Name
    {
        get
        {
            return _Name;
        }
        set
        {
            if (_Name != value)
            {
                NotifyPropertyChanging("Name");
                _Name = value;
                NotifyPropertyChanged("Name");
            }
        }
    }

    [Column]
    private int  _Score;
    public int  Score
    {
        get
        {
            return _Score;
        }
        set
        {
            if (_Score != value)
            {
                NotifyPropertyChanging("Score");
                _Score = value;
                NotifyPropertyChanged("Score");
            }
        }
    }

---

您的私有变量

得分
[Column]
上有
[Column]
，公共变量上没有：

private int  _Score;
[Column]
public int  Score
{
    get
    {
        return _Score;
    }
    set
    {
        if (_Score != value)
        {
            NotifyPropertyChanging("Score");
            _Score = value;
            NotifyPropertyChanged("Score");
        }
    }
}

您的私有变量
得分
[Column]
上有
[Column]
，公共变量上没有：

private int  _Score;
[Column]
public int  Score
{
    get
    {
        return _Score;
    }
    set
    {
        if (_Score != value)
        {
            NotifyPropertyChanging("Score");
            _Score = value;
            NotifyPropertyChanged("Score");
        }
    }
}