If the Rob's answer is not enough for you. Try Linq Dynamic. http://dynamiclinq.azurewebsites.net/
using System.Linq.Dynamic; //Import the Dynamic LINQ library
//The standard way, which requires compile-time knowledge
//of the data model
var result = myQuery
.Where(x => x.Field1 == "SomeValue")
.Select(x => new { x.Field1, x.Field2 });
//The Dynamic LINQ way, which lets you do the same thing
//without knowing the data model before hand
var result = myQuery
.Where("Field1=\"SomeValue\"")
.Select("new (Field1, Field2)");