Why I'm getting Lambda expression used inside Include is not valid.

[aqkbm]

Hi can any one just correct me the error occur when running the grid values using this below code:

Error: "An unhandled exception occurred while processing the request.
InvalidOperationException: Lambda expression used inside Include is not valid."

code: public IEnumerable GetAll()
{
return _context.LibraryAssets
.Include(asset => asset.Status)
.Include(asset => asset.Location);
}

in view side:

@foreach (var asset in Model.Assets) {

@asset.Title @asset.AuthorOrDirector @asset.DeweyCallNumber }