Receiving Context Menu events

User commands and Message commands have their own unique event just like the other interaction types. For user commands the event is UserCommandExecuted and for message commands the event is MessageCommandExecuted.

// For message commands
client.MessageCommandExecuted += MessageCommandHandler;

// For user commands
client.UserCommandExecuted += UserCommandHandler;

...

public async Task MessageCommandHandler(SocketMessageCommand arg)
{
    Console.WriteLine("Message command received!");
}

public async Task UserCommandHandler(SocketUserCommand arg)
{
    Console.WriteLine("User command received!");
}

User commands contain a SocketUser object called Member in their data class, showing the user that was clicked to run the command. Message commands contain a SocketMessage object called Message in their data class, showing the message that was clicked to run the command.

Both return the user who ran the command, the guild (if any), channel, etc.