C# winform datagridviewtextboxcolumn datapropertyname子级

我需要在表中显示子实体

// Entitys
public class Sp
{
   public int Id { get; set; }
   public int IdDict { get; set; }
   public Dict Dict { get; set; }
}

public class Dict
{
   public int Id { get; set; }
   public string Caption { get; set; }
}

如何绑定

var c = new DataGridViewTextBoxColumn
{
    // How can I do?
    DataPropertyName = "Dict.Caption"  
}

应用程序正在显示一个空单元格

如果您这样做了。工作

// Entitys
public class Sp  
{
    public int Id { get; set; }
    public int IdDict { get; set; }
    public Dict Dicts { get; set; }
    public DictCaption { get { return Dicts.Caption; } }
} 
public class Dict
{
    public int Id { get; set; }
    public string Caption { get; set; }
}
.... 
dataGridView.DataSource = dbContext.Set<Sp>().ToList;
var c = new DataGridViewTextBoxColumn
{
    DataPropertyName = "DictCaption"  
}

可能重复的