.NET

[#1]

When I load the linetype file

'' Load the Center Linetype
acCurDb.LoadLineTypeFile(sLineTypeName, gstrc_SFR_LineType_FullFileName)

How do I detect if the linetype is in the Linetype file? How do I do my error checking here in the ACAD way? 

Currently I just search the acad.lin or sfr.lin Text File to see if the LineType Exists. This works.

But I was curious how would you check the linetype file via the Acad API,

to see if the linetype definition name exists in the file? 

[#2]

Try/catch, resorting to the CONTINUOUS linetype hard-coded into AutoCAD in the event an error is thrown.

[#3]

or, with reference to the example from the developers guide, open the linetypetable and check whether linetypetable.has(linetype). in addition to reverting to any particular linetype - which may be perfectly fine - you can check for alternative linetypes and/or load a particular linetype file.