Why does Entity Framework 6.x not cache results?

Question

Perhaps I am misunderstanding the caching that DbContext and DbSet does but I was under the impression that there was some caching that would go on

Answer 1

Sometimes I use my extension method:

using System.Linq;
using System.Linq.Expressions;

namespace System.Data.Entity
{
    public static class DbSetExtensions
    {
        public static TEntity FirstOrDefaultCache(this DbSet queryable, Expression> condition) 
            where TEntity : class
        {
            return queryable
                .Local.FirstOrDefault(condition.Compile()) // find in local cache
                   ?? queryable.FirstOrDefault(condition); // if local cache returns null check the db
        }
    }
}

Usage:

db.Invoices.FirstOrDefaultCache(x => x.CustomerName == "Some name");

You can replace FirstOrDefault with SingleOrDetfault also.