Fixing an line in c# wpf

the line i got the error : 

IEnumerator enumerator = this.ListBox1.Items.GetEnumerator();
while (enumerator.MoveNext())
{
    object objectValue = RuntimeHelpers.GetObjectValue(enumerator.Current);
    list2.Add(Conversions.ToString(objectValue));
}

the error is in the first line.

error i got :

Error 1 'System.Windows.Data.CollectionView.GetEnumerator()' is inaccessible due to its protection level

how can i fix it ?

thx for the helpers !

MahApps wpf app

Jon Skeet
people
quotationmark

The simplest fix would be to use the language support for iterators:

foreach (object value in ListBox1.Items)
{
    list2.Add(Conversions.ToString(value));
}

If you expect the values to already be strings, you could make the foreach loop cast for you implicitly:

foreach (string value in ListBox1.Items)
{
    list2.Add(value);
}

Or if you're creating a new list anyway, you could use a one-liner:

var list2 = ListBox1.Items.Cast<string>().ToList();

The reason your current code doesn't work is that CollectionView uses explicit interface implementation for IEnumerable. You could change your code to just:

IEnumerator enumerator = ((IEnumerable)this.ListBox1.Items).GetEnumerator();

... but it would be much better to use one of the approaches above.

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