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Editorial Team
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Asked: 2026-06-17T03:54:47+00:00

This is probably a stupid question, but here goes. I have this statement in

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This is probably a stupid question, but here goes. I have this statement in my program:

 // No node should be shown as selected
 mdxTreeList.Selection.Set(new TreeListNode[0]);

The variable mdxTreeList is an instance of the DevExpress XtraTreeList.TreeList control, and TreeListNode is the name of another DevExpress class. But what exactly does the syntax “new TreeListNode[0]” mean? I would have thought it was a syntax error, but it works fine. (If I remember right, this statement originally came from a DevExpress sample program.)

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1 Answer

  1. Editorial Team

    It’s a one-dimensional array with zero length (i.e. zero members). The type is TreeListNode[].

    Some people prefer to write the same thing as new TreeListNode[] { } but that’s just a matter of taste.

    By the way, since static indexers are not allowed in C#, there’s no possibility this could be an indexer access. (Of course indexers are meant to “look like” arrays, so it is not by accident that both use square bracket [] syntax.)

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