~SqlDatabase()//析构器
{
Dispose();
function=null;
} public void Dispose()
{
trans=null;
str="";
ex=null;
Close();
}                   public bool IsConnected
{
get
{
if(con==null)
{
return false;
}
if(((con.State==ConnectionState.Closed)||(con.State==ConnectionState.Broken))||(con.State==ConnectionState.Connecting))
{
return false;
}
return true;
}
}提示发生连接池错误  怎么办