通过反射获取命名空间中的所有类型

using System;
using System.Reflection;

public class Program
{
    public static void Main()
    {
        Assembly assembly = Assembly.GetExecutingAssembly();
        Type[] types = assembly.GetTypes();

        foreach (Type type in types)
        {
            if (type.Namespace == "MyNamespace")
            {
                Console.WriteLine(type.FullName);
            }
        }
    }
}