Attempt to not have to separate command and command data to get some DI going. Most commands don't have dependencies which need to be injected (RavenDB in-memory store).

gistfile1.txt

public class CommandHandler : ICommandHandler
{
    private IKernel _kernel;
 
    public CommandHandler() { }
 
    public CommandHandler(IKernel kernel)
    {
        _kernel = kernel;
    }
 
    public void Execute(Command command)
    {
        var method = command.GetType().GetMethod("Inject");
        if (method != null)
        {
            var parameters = method.GetParameters();
            var paramterInstances = new List<object>();
 
            foreach (var parameter in parameters)
            {
                var type = parameter.ParameterType;
                var instance = _kernel.Get(type);
 
                paramterInstances.Add(instance);
            }
 
            method.Invoke(command, paramterInstances.ToArray());
        }
            
        var store = DocumentStore.Get();
        using (var session = store.OpenSession())
        {
            command.Session = session;
            command.Execute();
 
            session.SaveChanges();
        }
    }
}