private static readerSearch _instance = null; // 单例模式
public static readerSearch CreateInstance()
{
if (_instance == null)
{
_instance = new readerSearch();
}
return(_instance);
}
private void readerSearch_available_FormClosing(object sender, FormClosingEventArgs e)
{
rdID = -1;
_instance = null;
this.Dispose();
}