What does this statement (object) mean?

[Stan Huang at Taiwan]

See below snippet of C# program. I know how to use 'Current' in statement "public ExtractInfo Current" well, but I don't understand the other statement "object global::System.Collections.IEnumerator.Current". What does it mean? How to use it at upper applications which use this class?


public sealed class ExtractInfoArrayEnumerator : global::System.Collections.IEnumerator
, global::System.Collections.Generic.IEnumerator<ExtractInfo>
{
private ExtractInfoArray collectionRef;
.....

public ExtractInfoArrayEnumerator(ExtractInfoArray collection) {
collectionRef = collection;
...
}

// Type-safe iterator Current
public ExtractInfo Current {
get {
if (currentIndex == -1)
throw new global::System.InvalidOperationException("Enumeration not started.");
....
return (ExtractInfo)currentObject;
}
}

// Type-unsafe IEnumerator.Current
object global::System.Collections.IEnumerator.Current {
get {
return Current;
}
}

...

}

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