Rickey,The VBA code shows you how to extract the display expression for every feature in the layer and prints it to debug window. You can easily adapt this to c#Public Sub PrintDisplayExpressions()
' Get layer, assumed first in TOC and has a display expression set
Dim pMXD As IMxDocument
Set pMXD = ThisDocument
Dim pMap As IMap
Set pMap = pMXD.FocusMap
Dim pLayer As ILayer
Set pLayer = pMap.Layer(0)
Dim pFeaturelayer As IFeatureLayer
Set pFeaturelayer = pLayer
Dim pDisplayString As IDisplayString
Set pDisplayString = pFeaturelayer
' Print display string
Dim pFeatureCursor As IFeatureCursor
Set pFeatureCursor = pFeaturelayer.Search(Nothing, True)
Dim pFeature As IFeature
Set pFeature = pFeatureCursor.NextFeature
Do While Not pFeature Is Nothing
Debug.Print pDisplayString.FindDisplayString(pFeature)
Set pFeature = pFeatureCursor.NextFeature
Loop
End Sub
Duncan