The signature for a C# OER encode method is as follows:

   public override void Encode (Asn1OerEncodeBuffer buffer)

The buffer argument is a reference of an Asn1OerEncodeBuffer object that describes the buffer into which a message is to be encoded. This must be created and initialized before calling any encode method. See the description of this class in the C# Run-Time Classes section for details on how this class is used.

The OER encode methods do not return a value. Errors are reported via the exception mechanism. All ASN1C C# exceptions are derived from the Asn1Exception base class. See the section on exceptions for a complete list and description of the various exceptions that can be thrown.