//取最小设置金额的列
var minList = LsList.OrderBy(n=>n.Price).First();
//取最小设置金额的值
var minValue = LsList.Select(n => n.Price).ToList().Min();
var min= context.Fit_Detail.OrderBy(m=>m.Price).FirstOrDefault(m => m.Gid == item.Gid);