[GIS] Converting Arcobjects in VB.Net to C#

Question

I am attempting to learn ArcObjects using a tutorial that uses VB.NET and I am trying to convert it to C#. I have Visual C# 2008 Express Edition. This is an ArcMap Add-In project that creates a button that displays a message box with the name of the top most layer in the data frame. Here is the VB.NET code:

Dim pMxDoc As IMxDocument
pMxDoc = My.ArcMap.Application.Document
Dim pMap As IMap
pMap = pMxDoc.FocusMap 
Dim pFLayer As IFeatureLayer2
pFLayer = pMap.Layer(0)

Dim strDisplayField As String
strDisplayField = pFLayer.DisplayField

MsgBox(strDisplayField, vbOKOnly, "Test")

My conversion in C# so far:

using ESRI.ArcGIS.ArcMapUI:
using ESRI.ArcGIS.Carto;

IMxDocument pMxDoc = ArcMap.Application.Document as IMxDocument;
IMap pMap = pMxDoc.FocusMap;
IFeatureLayer2 pFLayer = pMap.

There is no 'Layer' property. Only 'LayerCount' to choose from.
I even tried this:

IFeatureLayer2 pFLayer = ArcMap.Application.Document as IFeatureLayer2;
pFLayer = pMap.

this didn't work either.
I have looked all over the ArcMap Object Diagram and I can't find the FeatureLayer2 class anywhere. According to ArcObjects SDK for .NET there is a Layer member for the IMap interface, but I don't have access to that. Any help would be grealty appreciated.

Answer 1

Try this:

IFeatureLayer GetFirstFeatureLayer()
{
    IMxDocument document = ArcMap.Document;
    IMap map = document.FocusMap;
    ILayer layer = map.get_Layer(0);
    return layer as IFeatureLayer;
}