SELECT * FROM table
ORDER BY NEWID()

using System;
using System.Data.Entity;
using System.Data.Entity.Migrations;
using System.Linq;

namespace Sample
{
    public class User
    {
        public int Id { get; set; }
        public string Name { get; set; }
        public int Age { get; set; }
    }

    public class MyContext : DbContext
    {
        public DbSet<User> Users { get; set; }
    }

    public class Configuration : DbMigrationsConfiguration<MyContext>
    {
        public Configuration()
        {
            AutomaticMigrationsEnabled = true;
            AutomaticMigrationDataLossAllowed = true;
        }

        protected override void Seed(MyContext context)
        {
            context.Users.Add(new User { Name = "User 1", Age = 20 });
            context.Users.Add(new User { Name = "User 2", Age = 25 });
            context.Users.Add(new User { Name = "User 3", Age = 30 });
            context.Users.Add(new User { Name = "User 4", Age = 35 });
            context.Users.Add(new User { Name = "User 5", Age = 40 });
            base.Seed(context);
        }
    }

    public static class Test
    {
        public static void RunTests()
        {
            Database.SetInitializer(new MigrateDatabaseToLatestVersion<MyContext, Configuration>());

            using (var context = new MyContext())
            {
               var randomListOfUsers =
                        context.Users
                               .Where(person => person.Age >= 25 && person.Age < 40)
                               .OrderBy(person => Guid.NewGuid())
                               .ToList();

               foreach (var person in randomListOfUsers)
                   Console.WriteLine("{0}:{1}", person.Name, person.Age);
            }
        }
    }
}

.OrderBy(person => Guid.NewGuid())

ORDER BY NEWID()

SELECT 
[Project1].[Id] AS [Id], 
[Project1].[Name] AS [Name], 
[Project1].[Age] AS [Age]
FROM ( SELECT 
NEWID() AS [C1], ------ Guid created here
[Extent1].[Id] AS [Id], 
[Extent1].[Name] AS [Name], 
[Extent1].[Age] AS [Age]
FROM [dbo].[Users] AS [Extent1]
WHERE ([Extent1].[Age] >= 25) AND ([Extent1].[Age] < 40)
)  AS [Project1]
ORDER BY [Project1].[C1] ASC  ------ Used for sorting here

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