关于SQL更新与Linq查询

Question

查询语句如下
FEMlibDataContext fdc = new FEMlibDataContext(); 
public Material(int? ID)
        {
            var material = from buf in fdc.Material
                           where buf.MaterialID == ID
                           select new
                           {
                               buf.YoungsModulus,
                           };
            YoungsModulus = (double)material.First().YoungsModulus;
        }
public double? YoungsModulus { get; set; }

Answer 1

事实上痛苦发现，调用了Dispose也没用