CleanCoder CleanCoder

## HTTP
// 页面定时刷新
<head>
@if (ViewBag.RefreshSeconds != null && ViewBag.RefreshSeconds > 0)
    {
    <meta http-equiv="refresh" content="@ViewBag.RefreshSeconds">
    }

</head>

## ExternalConfigurationManager From MS.txt
// Copyright (c) Microsoft. All rights reserved.
// Licensed under the MIT license. See LICENSE file in the project root for full license information.
namespace ExternalConfigurationStore.Cloud
{
    using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Reactive.Linq;
    using System.Reactive.Subjects;
    using System.Threading;

## DB
using EntityFramework;
using EntityFramework.Mapping;
using EntityFramework.Reflection;
using Next.Dal.Entity;
using Next.Dal.Repertory;
using Next.Dal.Repertory.DbRepertory;
using Next.Dal.Repertory.MemoryRepertory;
using Spring.Reflection.Dynamic;
using System;
using System.Collections.Generic;

## Utility - Comparer
  internal sealed class DynamicEqualityComparer<T> : IEqualityComparer<T>
        where T : class
    {
        private readonly Func<T, T, bool> _func;

        public DynamicEqualityComparer(Func<T, T, bool> func)
        {
            DebugCheck.NotNull(func);

            _func = func;

## TaskHelper
 internal static class TaskHelper
    {
        internal static Task<T> FromException<T>(Exception ex)
        {
            var completion = new TaskCompletionSource<T>();
            completion.SetException(ex);
            return completion.Task;
        }

        internal static Task<T> FromCancellation<T>()

## WinDBG
1) 准备工作
.loadby sos clr
.cordll -ve -u -l
.load  <<path>>\sosex.dll
.load  <<path>>\mex.dll
.symfix
.reload

2) 常用方法
!pe [<exceptionAddr>]	most recent exception data (don’t forget the external stack)

## Generic
// Dynamic Invoke Generic Method
MethodInfo methodInfo = typeof(MyClass).GetMethod("TestProc");
MethodInfo genericMethod = methodInfo.MakeGenericMethod(new[] { typeof(string) });
genericMethod.Invoke(null, new[] { "Hello" }); // the first parameter is null, means it is a static method


https://www.codeproject.com/Articles/584720/ExpressionplusbasedplusPropertyplusGettersplusandp
// returns property getter
public static Func<TObject, TProperty> GetPropGetter<TObject, TProperty>(string propertyName)
{

## Bash
clear # clean screen

netstat -tulpn | grep LISTEN           # check the listening ports and applications

## Task Extension
static async Task<T> Otherwise<T> (this Task<T> task, Func<Task<T>> orTask) {
    task.ContinueWith (async innerTask => {
        if (innerTask.Status == TaskStatus.Faulted)
            return await orTask ();

        return await Task.FromResult<T> (innerTask.Result);
    }).Unwrap ();
}

static async Task<T> Retry<T> (Func<Task<T>> task, int retries, TimeSpan delay, CancellationToken cts = default (CancellationToken)) {

## FP
struct Result<T> {
    public T Ok { get; }
    public Exception Error { get; }
    public bool IsFailed { get => Error != null; }
    public bool IsOk => !IsFailed;

    public Result (T ok) {
        Ok = ok;
        Error = default (Exception);
    }
	// 页面定时刷新
	<head>
	@if (ViewBag.RefreshSeconds != null && ViewBag.RefreshSeconds > 0)
	{
	<meta http-equiv="refresh" content="@ViewBag.RefreshSeconds">
	}

	</head>
	// Copyright (c) Microsoft. All rights reserved.
	// Licensed under the MIT license. See LICENSE file in the project root for full license information.
	namespace ExternalConfigurationStore.Cloud
	{
	using System;
	using System.Collections.Generic;
	using System.Linq;
	using System.Reactive.Linq;
	using System.Reactive.Subjects;
	using System.Threading;
	using EntityFramework;
	using EntityFramework.Mapping;
	using EntityFramework.Reflection;
	using Next.Dal.Entity;
	using Next.Dal.Repertory;
	using Next.Dal.Repertory.DbRepertory;
	using Next.Dal.Repertory.MemoryRepertory;
	using Spring.Reflection.Dynamic;
	using System;
	using System.Collections.Generic;
	internal sealed class DynamicEqualityComparer<T> : IEqualityComparer<T>
	where T : class
	{
	private readonly Func<T, T, bool> _func;

	public DynamicEqualityComparer(Func<T, T, bool> func)
	{
	DebugCheck.NotNull(func);

	_func = func;
	internal static class TaskHelper
	{
	internal static Task<T> FromException<T>(Exception ex)
	{
	var completion = new TaskCompletionSource<T>();
	completion.SetException(ex);
	return completion.Task;
	}

	internal static Task<T> FromCancellation<T>()
	1) 准备工作
	.loadby sos clr
	.cordll -ve -u -l
	.load <<path>>\sosex.dll
	.load <<path>>\mex.dll
	.symfix
	.reload

	2) 常用方法
	!pe [<exceptionAddr>] most recent exception data (don’t forget the external stack)
	// Dynamic Invoke Generic Method
	MethodInfo methodInfo = typeof(MyClass).GetMethod("TestProc");
	MethodInfo genericMethod = methodInfo.MakeGenericMethod(new[] { typeof(string) });
	genericMethod.Invoke(null, new[] { "Hello" }); // the first parameter is null, means it is a static method


	https://www.codeproject.com/Articles/584720/ExpressionplusbasedplusPropertyplusGettersplusandp
	// returns property getter
	public static Func<TObject, TProperty> GetPropGetter<TObject, TProperty>(string propertyName)
	{
	clear # clean screen

	netstat -tulpn \| grep LISTEN # check the listening ports and applications
	static async Task<T> Otherwise<T> (this Task<T> task, Func<Task<T>> orTask) {
	task.ContinueWith (async innerTask => {
	if (innerTask.Status == TaskStatus.Faulted)
	return await orTask ();

	return await Task.FromResult<T> (innerTask.Result);
	}).Unwrap ();
	}

	static async Task<T> Retry<T> (Func<Task<T>> task, int retries, TimeSpan delay, CancellationToken cts = default (CancellationToken)) {
	struct Result<T> {
	public T Ok { get; }
	public Exception Error { get; }
	public bool IsFailed { get => Error != null; }
	public bool IsOk => !IsFailed;

	public Result (T ok) {
	Ok = ok;
	Error = default (Exception);
	}