Cannot implicitly convert type 'System.Linq.IQueryable' to 'System.Data.Entity.DbSet'

Question

I\'m new in Linq and so I have these situation below.

Now below error during compilation, says Cannot implicitly convert type \'System.Linq.IQuery

Answer 1

When using var the compiler infers the type of the expression to the right of the assignment. When you write

var query = _db.Products;

query is of type DbSet, and it cannot be assigned any IQueryable, which the Where extension method returns.

When you used the query syntax, query was again IQueryable, which made it work. It's equivalent to writing

var query = products.Select(t => t);

The Select extension method, like Where, returns IQueryable.