将字符串列表绑定到ComboBox

Question

I am binding a List<String> to a ComboBox. I wrote this in two ways. The first way, the output of ComboBox was empty. Where i was wrong? please help me. this is my code:

public class MaritalStatusComboBox:ComboBox
{
   public MaritalStatusComboBox()
    {       
        BindingSource bs = new BindingSource();
        bs.DataSource = new List<string> {"Single","Married" };

    }
}

and The Second way :

public class MaritalStatusComboBox:ComboBox
{
    List<string> list = new List<string>() { "Single", "Married" };
    public MaritalStatusComboBox()
    {
        this.Items.Clear();
        foreach (string str in list)
        {
            this.Items.Add(str);
        }

    }
}

output of ComboBox include of it: Single, Married, Collection Why does Collection appear in my ComboBox?

Answer 1

In this first method, you didn't connect the DataSource:

BindingSource bs = new BindingSource();
bs.DataSource = new List<string> { "Single", "Married" };
this.DataSource = bs;

The second method worked. The posted code does not show the word "Collection".