1.先获得最大值的汇总数据

Dim tem1 = From k In lstCPMasterTemp _
Group k By code = k.CpCode Into g = Group,maxVersion = Max(k.Version) _

Select code,maxVersion

2.Join原数据
m_lstCPMaster = (From k In lstCPMasterTemp _
Join g In tem1 On g.code Equals k.CpCode And g.maxVersion Equals k.Version _

Select k).ToList