public static Class GetClassBLLInstance()
{
//如实例不存在，则New一个新实例，否则返回已有实例
if (ClassBLLInstance == null)
{
lock (syncRootClass)
{
if (ClassBLLInstance == null)
ClassBLLInstance = new Class();
}
}
return ClassBLLInstance;
}
public static string GetClassName(int id)
{
var bll = new Class();
return bll.GetModel(id).Name;
}