LINQ to Entities does not support LINQ expression node type "Invoke"

<summary>
Entity Query
</summary>
Public ienumerable<tentity> getsearchlist (system.linq.expressions.expression<func<tentity, bool> > Where)
{
if (where = = null)
Return this._db. Set<tentity> (). Asexpandable ();//. Asexpandable (); //这个最重要.否则会出如题的错误.
Return this._db. Set<tentity> (). Asexpandable (). where (where);

}

//Solve the problem: Where () First use asexpandable ()/ 这个最重要.否则会出如题的错误. /

LINQ to Entities does not support LINQ expression node type "Invoke"