Remove StructuredDocumentTag

[footloose]

I
a document with several StructuredDocumentTags I want to remove all but one, at
for that specific one I want to remove the SDT, but keep the content.
When
Remove() or RemoveSelfOnly() executed, the for each loop exit, hence only the
first SDT is handled.

var doc = new Document(fileName);
string tagName = "A";
foreach(var item in doc.GetChildNodes(NodeType.StructuredDocumentTag, true, true))
{
    var sdt = (StructuredDocumentTag)item;
    if (sdt.Tag.Equals(tagName))
        sdt.RemoveSelfOnly();
    else
        sdt.Remove();
}

What is wrong with the code?

[adam.skelton1]

Hi Henrik,

Thanks for your inquiry.

You are invalidating the enumerator when removing one of the structured document tags which causes the loop to exit early. Instead, try using the code below:

var doc = new Document(fileName);
string tagName = "A";
Node[] tags = doc.GetChildNodes(NodeType.StructuredDocumentTag, true, true)).ToArray();
foreach(var item in tags)
{
    var sdt = (StructuredDocumentTag) item;
    if (sdt.Tag.Equals(tagName))
        sdt.RemoveSelfOnly();
    else
        sdt.Remove();
}

Thanks,