Entity Framework No-Tracking Queries
Updated: October 23, 2016
Sometimes you may want to get entities back from a query but not have those entities be tracked by the context. This may result in better performance when querying for large numbers of entities in read-only scenarios. The techniques shown in this topic apply equally to models created with Code First and the EF Designer.
A new extension method AsNoTracking allows any query to be run in this way. For example:
using (var context = new BloggingContext()) { // Query for all blogs without tracking them var blogs1 = context.Blogs.AsNoTracking(); // Query for some blogs without tracking them var blogs2 = context.Blogs .Where(b => b.Name.Contains(".NET")) .AsNoTracking() .ToList(); }