Types

IAuthenticationDigest authenticationImplementation = Authentication.GetInstance(AuthenticationDigests.MD5);
authenticationImplementation.authenticateIncomingMsg(...);
authenticationImplementation.authenticateOutgoingMsg(...);

MutableByte buffer = new MutableByte();
buffer += "test data";
buffer.Append(". More test data");
buffer.Prepend("This is ");
Console.WriteLine(buffer.ToString()); // Prints out "This is test data. More test data"
buffer.RemoveBeginning(8); // The buffer now holds "test data. More test data"
buffer.Prepend("It could be "); // buffer is "It could be test data. More test data"
buffer.RemoveEnd(" More test data".Length); // buffer: "It could be test data."
buffer.Remove(12,5); // buffer: "It could be data"
Console.WriteLine("{0}",Convert.ToChar(buffer[1])); // Output: "t"
byte[] tmpBuffer = buffer; // Implicit conversion to byte[]
buffer.Reset(); // Erase all the data from the buffer

[... prepare for a get operation ...]
Pdu response = target.request(outpdu);
foreach(Vb vb in response.VbList) {
    if( vb.Value is NoSuchObject ) {
        return "Requested MIB variable does not exist on the agent.";
    }
}

int myPrivacyProtocol = PrivacyProtocol.AES128;

IPrivacyProtocol privacyImplementation = PrivacyProtocol.GetInstance(myPrivacyProtocol);
byte[] result = privacyImplementation.Encrypt(....);

SnmpError.ErrorMessage(12);