c# 如何在对象级隐藏接口的实现

public class EnumerableSample2:IEnumerable
{
private int[] arry = new int[4];
public EnumerableSample2()
{
}
IEnumerator IEnumerable.GetEnumerator()
{
return arry.GetEnumerator();
}
}

Console.WriteLine("Sample2----------------------");
EnumerableSample2 sample2 = new EnumerableSample2();
foreach (int i in sample2)
{
Console.WriteLine(i);
}