Unlike what is done for other encoding rules, for MDER we provide stream-based encoding only. In order to encode to a memory buffer, you simply use a System.IO.MemoryStream.

For each ASN.1 production defined in an ASN.1 source file, an encode method may be generated. This function will convert a populated variable of the given type into an encoded ASN.1 message.

An encode method is only generated if it is required to alter the behavior of the base class. The C# model is built on inheritance from a set of common run-time base classes. MDER supports only a few primitive types, and most of these are subsets of ASN.1 built-in types. Therefore, in most cases, there is not an applicable MDER encode method in the common run-time base class and so an encode method will be generated.

The generated classes for all constructed types (SEQUENCE, SEQUENCE OF, and CHOICE) will include generated encode methods.