“拼接”linq查询

static void Main( string[] args)
        {
             List< Person> list =  new  List< Person>() { 
                 new  Person(){ Age=20, Name= "wengyuli", Parts= new  Part(){ Name= "123"}},
                 new  Person(){ Age=30, Name= "chenyang", Parts= new  Part(){ Name= "123456"}},
                 new  Person(){ Age=40, Name= "heshuai", Parts= new  Part(){ Name= "123"}},
                 new  Person(){ Age=50, Name= "heyunlong", Parts= new  Part(){ Name= "123456"}}
            };

             var c =  Expression.Parameter( typeof( Person),  "m");

             Expression condition =  Expression.Constant( false);


             Expression con =  Expression.Call(
                 Expression.Property(c, typeof( Person).GetProperty( "Name")),
                 typeof( string).GetMethod( "StartsWith", new  Type[]{ typeof( string)}),
                 Expression.Constant( "wengyuli"));

            condition =  Expression.Or(con, condition); 
             Expression< Func< Person,  bool>> end =  Expression.Lambda< Func< Person,  bool>>(condition,  new  ParameterExpression[] { c });
        }
        
         class  Person
        {
             public string Name {  set;  get; }
             public int Age {  set;  get; }
             public  Part Parts {  set;  get; }
        }

         class  Part
        {
             public string Name {  set;  get; }
        }
    }