public class CoedgeCollection : ICollection, 
	IEnumerable, IEnumerable<Coedge>

Project.UndoContext.BeginUndoStep("CoedgeProperties");
try
{
    Station station = Station.ActiveStation;

    // Create a box.
    Part myPart = new Part();
    myPart.Name = "MyPart";
    station.GraphicComponents.Add(myPart);
    Body box = Body.CreateSolidBox(new Matrix4(Vector3.XVector, 0.0), new Vector3(0.1, 0.1, 0.1));
    box.Name = "MyBox";
    myPart.Bodies.Add(box);

    // Get a coedge from the box.
    Coedge myCoedge = box.Shells[0].Faces[0].Loops[0].Coedges[0];

    // Output some info of the coedge.
    Logger.AddMessage(new LogMessage("The body of the coedge is: " + myCoedge.Body.Name));
    Logger.AddMessage(new LogMessage("The edge of the coedge is: " + myCoedge.Edge.Name));
    Logger.AddMessage(new LogMessage("The coedge is reversed: " + myCoedge.Reversed.ToString()));

    Logger.AddMessage(new LogMessage("The start vertex of the coedge is : (" + myCoedge.StartVertex.Position.x.ToString() +
                                                                        ", " + myCoedge.StartVertex.Position.y.ToString() +
                                                                        ", " + myCoedge.StartVertex.Position.z.ToString() + ")"));

    Logger.AddMessage(new LogMessage("The end vertex of the coedge is : (" + myCoedge.EndVertex.Position.x.ToString() +
                                                                      ", " + myCoedge.EndVertex.Position.y.ToString() +
                                                                      ", " + myCoedge.EndVertex.Position.z.ToString() + ")"));
}
catch
{
    Project.UndoContext.CancelUndoStep(CancelUndoStepType.Rollback);
    throw;
}
finally
{
    Project.UndoContext.EndUndoStep();
}