C#动态创建单例类的对象

单例类

public class SnappingClass : ISnappingEnvironment, IExtension

    {

        //

        private static readonly SnappingClass instance = null;

        static SnappingClass()

        {

            instance = new SnappingClass();

        }

        private SnappingClass()

        {

        }

        public static SnappingClass Instance

        {

            get

            {

                return instance;

            }

        }

动态创建：

void IExtensionManagerAdmin.StartupExtensions(string componentCategory, string jitCategory, ref object initializationData)

        {

            var typeInfos = AppDomain.CurrentDomain.GetAssemblies().SelectMany(a => a.GetTypes().Where(t => t.GetInterfaces().Contains(typeof(IExtension)))).ToArray();

            foreach (var typeInfo in typeInfos)

            {

                //Console.WriteLine(typeInfo.FullName);

                //IExtension pExtension = typeInfo.Assembly.CreateInstance(v.FullName) as IExtension;

                //MethodInfo methodInfo = typeInfo.GetMethod("Instance", BindingFlags.NonPublic | BindingFlags.Static, null, new Type[] { }, null);

                //IExtension pExtension = methodInfo.Invoke(null, null) as IExtension;

                //

                PropertyInfo propertyInfo = typeInfo.GetProperty("Instance", BindingFlags.Public |  BindingFlags.NonPublic | BindingFlags.Static);

                //

                //PropertyInfo[] propertyInfos = typeInfo.GetProperties(BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Static);

                //foreach (PropertyInfo propertyInfo in propertyInfos)

                //{

                //    Console.WriteLine(propertyInfo.Name);

                //}

                IExtension pExtension = propertyInfo.GetValue(null, null) as IExtension;

                //

                pExtension.Startup(ref initializationData);

                this.pExtensionList.Add(new KeyValuePair<string, IExtension>(pExtension.Name, pExtension));

            }

        }

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