class MyAttribute : Attribute 
    {
public MyAttribute(string name)
        {
this.name = name;
            COUNT++;
        }

internal string name = string.Empty;
internal static int COUNT = 0;
    }

    [MyAttribute("attribute")]
class MyClass 
    {
public MyClass() 
        {

        }
    }

class Program
    {
static void Main(string[] args)
        {
            MyClass myClass = new MyClass();


            myClass.GetType().GetCustomAttributes(false);
            myClass.GetType().GetCustomAttributes(false);
            myClass.GetType().GetCustomAttributes(false);

//3
            System.Console.WriteLine(MyAttribute0.COUNT);
        }
    }

    [MyAttribute("myattribute0"), MyAttribute("myattribute1"), MyAttribute("myattribute2")]
    [MyAttribute("myattribute11")]
    [MyAttribute("myattribute22")]
class MyClass 
    {
public MyClass() 
        {

        }
    }

class Program
    {
static void Main(string[] args)
        {
            MyClass myClass = new MyClass();
object[] objs = myClass.GetType().GetCustomAttributes(typeof(MyAttribute),true);
foreach(MyAttribute myAttribute in objs)
            {
                Console.WriteLine(myAttribute.name);
            }

//myattribute0
//myattribute22
//myattribute1
//myattribute2
//myattribute11
        }
    }

bool,byte,char,double,float,int,long,short,string,System.Type,object,enum
以上类型的array

AttributeUsage //属性特征类
Attribute.GetCustomAttribute
Attribute.GetCustomAttributes
Type.GetCustomAttribute
Type.GetCustomAttributes
......