Handling Exceptions

[BlackBox]

Also I have been playing with a new routine, but I need to return a list of sublists ( as a result buffer).

I have been playing around with Lists, Arrays, Structures, but nothing has the versatility of a LISP List.

Suggestions or examples?

I want to be able to manipulate one of the above data types in .net and convert it to a result buffer as a return value.

I want each cell in the 2d array to contain any of the object types.

I believe this is what you're after:

Returning nested list from .NET to LISP

...

You can find the ResultBuffer TypedValue related codes in the LispDataType enum. As you can see RTRESBUF/5023 is not in the list. You could place the nested part in a LispDataType.ListBegin/LispDataType.ListEnd section instead:

[LispFunction("GetNestedList")]
public static ResultBuffer GetNestedList(ResultBuffer resBufIn)
{
  ResultBuffer resBufOut = new ResultBuffer();
 
  resBufOut.Add(
    new TypedValue((int)LispDataType.Text, "Main List Item 1"));
 
  resBufOut.Add(new TypedValue((int)LispDataType.ListBegin));
    resBufOut.Add(
      new TypedValue((int)LispDataType.Text, "Nested List Item 1"));
    resBufOut.Add(
      new TypedValue((int)LispDataType.Text, "Nested List Item 2"));
  resBufOut.Add(new TypedValue((int)LispDataType.ListEnd));
 
  resBufOut.Add(
    new TypedValue((int)LispDataType.Text, "Main List Item 2"));  
 
  return resBufOut;
}