Search through Where clause in LINQ, using dynamic properties

I'm basically trying to construct a query, and I don't know why microsoft made this so difficult in Entity Framework and LINQ. I have various parameter STRINGS. So if you see a variable, assume it's a string passed in from somewhere.

             users = this.entities.tableUsers
                .Where(searchfield+" LIKE %@0%", search)
                .OrderBy(x => x.GetType().GetProperty(order_by).GetValue(x, null).ToString())
                .Skip(Convert.ToInt32(limit_begin))
                .Take(Convert.ToInt32(limit_end))
                .ToList();

My question is what to put inside "Where()" function in LINQ.

I want to search a field with string "searchfield", for the value .contains() "search".

Not sure why Visual Studio won't let me do this easily.

I've tried this as well, no luck:

.Where(x => x.GetType().GetProperty(searchfield).GetValue(x, null).ToList().Contains(search))

Note: I don't want to install any new libraries, this should be incredibly easy and simple for a modern language. I don't mind if the query returns all the rows and I search through it AFTER with .Contains().