public override bool Equals(object obj)
{
if (!base.Equals(obj))
{
return(false);
}
if (obj == null)
{
return(false);
}
if (this.GetType() != obj.GetType())
{
return(false);
}
AccountsAttribute other = obj as AccountsAttribute;
if (other.m_accounts != m_accounts)
{
return(false);
}
return(true);
}
public static void CanWriteCheck(object obj)
{
//构造Attribute类型的一个实例，并初始化 用于显示查找的内容
Attribute checking = new AccountsAttribute(Accounts.Checking);
//构造应用于类型的Attribute实例
Attribute validAccounts = Attribute.GetCustomAttribute(obj.GetType(), typeof(AccountsAttribute), false);
//如果Attribute应用于类型而且Attribute指定了， “Checking”账户，表明该类型可以开支票
if (validAccounts != null && checking.Match(validAccounts))
{
Console.WriteLine("{0} types can write checks", obj.GetType());
}
else
{
Console.WriteLine("{0} types can not write checks", obj.GetType());
}
}
