What does “yield break;” do in C#?

Question

I have seen this syntax in MSDN: yield break, but I don\'t know what it does. Does anyone know?

Answer 1

Tells the iterator that it's reached the end.

As an example:

public interface INode
{
    IEnumerable GetChildren();
}

public class NodeWithTenChildren : INode
{
    private Node[] m_children = new Node[10];

    public IEnumerable GetChildren()
    {
        for( int n = 0; n < 10; ++n )
        {
            yield return m_children[ n ];
        }
    }
}

public class NodeWithNoChildren : INode
{
    public IEnumerable GetChildren()
    {
        yield break;
    }
}