AutoCAD .NET :: Removing Default Layers

I'm just finishing up with a command that sets up custom paperspaces for our designers, and once it's done, it deletes the default Layout1 and Layout2 paperspace. The error i'm getting though is the following:

If a drawing contains Layout1 and Layout2, both are deleted as they should be

If a drawing contains Layout1 but not Layout2

or 

If a drawing contains Layout2 but not Layout1

I get an error and it crashes. This seems really stupid i know, but i must be doing something wrong here. I'm using if statements to determine if Layout1 exists, then delete it, and if Layout2 exists, then delete it. However, it seems that every time, if one of those layouts are missing, it still assumes it's there, tries to delete it, and errors out because it doesn't exist. I've tried many variations of "if" statements.

My

public class CHDelete
{
// This function will delete Layout1 and Layout2
[Autodesk.AutoCAD.Runtime.CommandMethod("CHDelete")]
public void CHRENAMECOMMAND()
{
[code].......