using System;
using System.Collections;
using System.ComponentModel;
class IterationSampleIterator : IEnumerator{
public IterationSample parent;
public int position;
internal IterationSampleIterator(IterationSample parent){
this.parent = parent;
position = -1;
}
public bool MoveNext(){
if (position != parent.values.Length){
position++;
}
return position < parent.values.Length;
}
public object Current{
get{
if (position == -1 || position == parent.values.Length){
throw new InvalidOperationException();
}
int index = (position + parent.startingPoint);
index = index % parent.values.Length;
return parent.values[index];
}
}
public void Reset(){
position = -1;
}
}
class IterationSample : IEnumerable{
public object[] values;
public int startingPoint;
public IterationSample(object[] values, int startingPoint){
this.values = values;
this.startingPoint = startingPoint;
}
public IEnumerator GetEnumerator()
{
return new IterationSampleIterator(this);
}
public static void Main(){
object[] values = { "a", "b", "c", "d", "e" };
IterationSample collection = new IterationSample(values, 3);
foreach (object x in collection){
Console.WriteLine(x);
}
}
}
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