A CHOICE value specification causes a readonly static instance of the C# class generated for the CHOICE to be generated.
ASN.1 production:
<name> <ChoiceType> ::= elemname : <elemvalue>
Generated C# constants:
public static readonly <ChoiceType> <name> = new <ChoiceType> (<ElemCode>, new <ElemType> (<elemvalue>));
For example, consider the following declaration:
ChoiceType ::= CHOICE { oid OBJECT IDENTIFIER, id INTEGER }
value ChoiceType ::= id: 1
This would result in the following C# constant being generated:
public static readonly ChoiceType value = new ChoiceType (ChoiceType._ID, new Asn1Integer(1));