Here’s a summary of what’s new in this preview release:
TryParse in MVC and API controllersResults.Stream() overloadsServerReady event for measuring startup time
https://github.com/Vintharas/angular2-step-by-step-01-your-first-component https://github.com/Vintharas/angular2-step-by-step-02-refactoring-to-services https://github.com/Vintharas/angular2-step-by-step-03-your-second-component-and-data-bindings https://github.com/Vintharas/angular2-step-by-step-04-routing https://github.com/Vintharas/angular2-step-by-step-05-forms-and-validation https://github.com/Vintharas/angular2-step-by-step-06-consuming-real-data-with-http
> HTTP/2 403
> Date: Tue, 20 Aug 2013 14:50:41 GMT
> x-ratelimit-limit: 60
> x-ratelimit-remaining: 0
> x-ratelimit-used: 60
> x-ratelimit-reset: 1377013266
> {
> "message": "API rate limit exceeded for xxx.xxx.xxx.xxx. (But here's the good news: Authenticated requests get a higher rate limit. Check out the documentation for more details.)",
> "documentation_url": "https://docs.github.com/rest/overview/resources-in-the-rest-api#rate-limiting"
> } private IList<int>? _idsList;
private IEnumerable<int>? _idsEnumerable;
private int[]? _idsArray;
[GlobalSetup]
public void Setup()
{
_idsEnumerable = Enumerable.Range(0, 10000);
_idsList = _idsEnumerable.ToList();
_idsArray = _idsEnumerable.ToArray();
} var list = _idsList ?? new List<int>();
if (list.Any() is false) { } if (_idsList is null || _idsList.Any() is false) { } if (_idsList == null || _idsList.Any() is false) { } if (_idsList?.Any() is false) { } if (_idsList is { Count: > 0 } is false) { } if (_idsList?.Count == 0) { } if (_idsList == null || _idsList.Count == 0) { } <Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<OutputType>Exe</OutputType>
<TargetFramework>net5.0</TargetFramework>
<Nullable>enable</Nullable>
<TreatWarningsAsErrors>true</TreatWarningsAsErrors>
</PropertyGroup>
<ItemGroup>
<PackageReference Include="BenchmarkDotNet" Version="0.12.1" />
</ItemGroup>
</Project> using BenchmarkDotNet.Running;
namespace AnyCountBenchmark
{
public static class Program
{
static void Main(string[] args)
{
#if DEBUG
System.Console.WriteLine("Please set the project's configuration to Release mode first.");
#else
BenchmarkRunner.Run<Scenarios>();
#endif
}
}
} using System;
using System.Collections.Generic;
using System.Linq;
using BenchmarkDotNet.Attributes;
using BenchmarkDotNet.Jobs;
using BenchmarkDotNet.Order;
namespace AnyCountBenchmark
{
[SimpleJob(RuntimeMoniker.NetCoreApp50)]
[Orderer(SummaryOrderPolicy.FastestToSlowest, MethodOrderPolicy.Declared)]
[RankColumn]
public class Scenarios
{
private IList<int>? _idsList;
private IEnumerable<int>? _idsEnumerable;
private int[]? _idsArray;
[GlobalSetup]
public void Setup()
{
_idsEnumerable = Enumerable.Range(0, 10000);
_idsList = _idsEnumerable.ToList();
_idsArray = _idsEnumerable.ToArray();
}
#region Any_With_Null_coalescing
[Benchmark]
public void List_Any_With_Null_coalescing()
{
var list = _idsList ?? new List<int>();
if (list.Any() is false) { }
}
[Benchmark]
public void Array_Any_With_Null_coalescing()
{
var array = _idsArray ?? Array.Empty<int>();
if (array.Any() is false) { }
}
[Benchmark]
public void Enumerable_Any_With_Null_coalescing()
{
var enumerable = _idsEnumerable ?? Enumerable.Empty<int>();
if (enumerable.Any() is false) { }
}
#endregion
#region Any_With_Is_Null_Check
[Benchmark]
public void List_Any_With_Is_Null_Check()
{
if (_idsList is null || _idsList.Any() is false) { }
}
[Benchmark]
public void Array_Any_With_Is_Null_Check()
{
if (_idsArray is null || _idsArray.Any() is false) { }
}
[Benchmark]
public void Enumerable_Any_With_Is_Null_Check()
{
if (_idsEnumerable is null || _idsEnumerable.Any() is false) { }
}
#endregion
#region Any_Any_With_Null_Equality_Check
[Benchmark]
public void List_Any_With_Null_Equality_Check()
{
if (_idsList == null || _idsList.Any() is false) { }
}
[Benchmark]
public void Array_Any_With_Null_Equality_Check()
{
if (_idsArray == null || _idsArray.Any() is false) { }
}
[Benchmark]
public void Enumerable_Any_With_Null_Equality_Check()
{
if (_idsEnumerable == null || _idsEnumerable.Any() is false) { }
}
#endregion
#region Any_With_Null_Conditional_Operator
[Benchmark]
public void List_Any_With_Null_Conditional_Operator()
{
if (_idsList?.Any() is false) { }
}
[Benchmark]
public void Array_Any_With_Null_Conditional_Operator()
{
if (_idsArray?.Any() is false) { }
}
[Benchmark]
public void Enumerable_Any_With_Null_Conditional_Operator()
{
if (_idsEnumerable?.Any() is false) { }
}
#endregion
#region Count_With_Pattern_Matching
[Benchmark]
public void List_Count_With_Pattern_Matching()
{
if (_idsList is { Count: > 0 } is false) { }
}
[Benchmark]
public void Array_Length_With_Pattern_Matching()
{
if (_idsArray is { Length: > 0 } is false) { }
}
[Benchmark]
public void Enumerable_Count_With_Pattern_Matching()
{
var list = _idsEnumerable?.ToList();
if (list is { Count: > 0 } is false) { }
}
#endregion
#region Count_With_Null_Conditional_Operator
[Benchmark]
public void List_Count_With_Null_Conditional_Operator()
{
if (_idsList?.Count == 0) { }
}
[Benchmark]
public void Array_Length_With_Null_Conditional_Operator()
{
if (_idsArray?.Length == 0) { }
}
[Benchmark]
public void Enumerable_Count_With_Null_Conditional_Operator()
{
if (_idsEnumerable?.Count() == 0) { }
}
#endregion
#region Count_With_Null_Equality_Check
[Benchmark]
public void List_Count_With_Null_Equality_Check()
{
if (_idsList == null || _idsList.Count == 0) { }
}
[Benchmark]
public void Array_Length_With_Null_Equality_Check()
{
if (_idsArray == null || _idsArray.Length == 0) { }
}
[Benchmark]
public void Enumerable_Count_With_Null_Equality_Check()
{
if (_idsEnumerable == null || _idsEnumerable.Count() == 0) { }
}
#endregion
}
} 
using System;
using System.Collections.Generic;
namespace Refactoring.Day7.IntroduceParameterObject.Before
{
public class Registration
{
public void Create(string name, DateTime date, DateTime validUntil,
IEnumerable<string> courses, decimal credits)
{
// do work
}
}
}
using System;
using System.Collections.Generic;
namespace Refactoring.Day7.IntroduceParameterObject.After
{
public class RegistrationContext
{
public string Name {set;get;}
public DateTime Date {set;get;}
public DateTime ValidUntil {set;get;}
public IEnumerable<string> Courses {set;get;}
public decimal Credits { set; get; }
}
}
namespace Refactoring.Day7.IntroduceParameterObject.After
{
public class Registration
{
public void Create(RegistrationContext registrationContext)
{
// do work
}
}
}
public int GetIndex(int pageSize, int pageNumber, ...) { ...
using System;
namespace Refactoring.Day4.RemoveDuplication.Before
{
public class PersonalRecord
{
public DateTime DateArchived { get; private set; }
public bool Archived { get; private set; }
public void ArchiveRecord()
{
Archived = true;
DateArchived = DateTime.Now;
}
public void CloseRecord()
{
Archived = true;
DateArchived = DateTime.Now;
}
}
}
using System;
namespace Refactoring.Day4.RemoveDuplication.After
{
public class PersonalRecord
{
public DateTime DateArchived { get; private set; }
public bool Archived { get; private set; }
public void ArchiveRecord()
{
switchToArchived();
}
public void CloseRecord()
{
switchToArchived();
}
private void switchToArchived()
{
Archived = true;
DateArchived = DateTime.Now;
}
}
}
A DbContext instance represents a combination of the Unit Of Work and Repository patterns such that
it can be used to query from a database and group together changes that will then be written back to
the store as a unit. DbContext is conceptually similar to ObjectContext.
