Filter out frozen entities from a selection

[michael.robertson]

I'm using a typed value list to create a  selection filter to use with Editor.SelectAll(filter) method. The selection returns both frozen & un-frozen entities. Is there a way to filter out frozen objects using the filter?

[Jeff_M]

Loop through the layer table, making a string of the frozen layer names "Layer1,Layer2". Include this with the layer code inside a "NOT" pair. 

filterList.Add(new TypedValue(-4, "<NOT");

filterList.Add(new TypedValue(8, frozenlayerstring);

filterList.Add(new TypedValue(-4, "NOT>");

[michael.robertson]

Thanks for the idea.

What I ended up doing was I was already needing to check the entities in the selectionset so I just grabed the layerid from the entitiy then used the LayerTableRecord.IsFrozen to check before I did the processing on the entity.