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C# debug application startup

Add 1 System.Diagnostics.Debugger.Launch(); to Application_Start. You’ll get a popup asking you if you want to debug the website, and if you click OK, you’ll be taken to Visual Studio in debug m...

Posted by Kerwen Blog on January 6, 2020

C# XML序列化

Open xml to copy xml content Create a new class in VS Edit -> Paste Special -> Paste XML as Classes 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 [System.Xml.Serializat...

Posted by Kerwen Blog on January 3, 2020

C#加密解密

Reference How to: Store Asymmetric Keys in a Key Container RSA Encryption, getting bad length RSACryptoServiceProvider encrypt and decrypt using own public and private key Key Storage and Retri...

Posted by Kerwen Blog on December 24, 2019

C# SQLite 性能优化

https://blog.csdn.net/qingzhuyuxian/article/details/79768032 https://zhuanlan.zhihu.com/p/84768332 Write-Ahead Logging SQLite WAL 模式简单介绍 SQLite的原子提交及WAL日志模式

Posted by Kerwen Blog on December 16, 2019

如何限制Task的最大并发数量

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 int maxConcurrency=10; var messages = new List<string>(); using(SemaphoreSlim concurrencySemaphore = new SemaphoreSlim(max...

Posted by Kerwen Blog on December 10, 2019

VisualStudio 升级过程中提示root node is not in the package collection.

升级Visual Studio 2017 到 15.9.16版本时，冒出以下提示： 1 Setup operation failed: The root node "Microsoft.VisualStudio.Product.Professional,version=15.0.26403.7" is not in the package collection. 解决方案： Pleas...

Posted by Kerwen Blog on November 12, 2019

基金进阶课

投资风险单一资产的风险和收益关系成正相关，一般是风险低，回报就低；回报高的，风险也高。马考维茨投资组合有效边界模型：通过将投资品进行组合，在相同的风险下，可能带来更高的收益，也有可能导致收益下滑。风险分类：非系统风险企业经营风险企业财务风险行业风险系统性风险市场风险利率风险当利率上升时，意味着把钱存在银行都能获得还不错的收益，大家当然愿意把钱存...

Posted by Kerwen Blog on November 9, 2019

VisualStudio 打开工程提示保存 devenv.sln

今天升级Visual Studio 2017 到 15.9.16版本，打开一个已有的工程，冒出以下提示：解决方案：需要配置 “C:\Program Files (x86)\Common Files\microsoft shared\MSEnv\vslauncher.exe” 以 Administrator权限运行. 右键 VSLauncher.exe 选择属性 —》选择 Comp...

Posted by Kerwen Blog on November 8, 2019

Custom Action condition

Modify & Repair 1 Installed AND Not REMOVE Only Install 1 NOT Installed AND NOT PATCH initial installation only: 1 NOT Installed Uninstall 1 REMOVE Install and repair 1 NOT REM...

Posted by Kerwen Blog on September 12, 2019

Jenkins Pipeline

Pipeline介绍 Pipeline，简而言之，就是一套运行于Jenkins上的工作流框架，将原本独立运行于单个或者多个节点的任务连接起来，实现单个任务难以完成的复杂流程编排与可视化。 Pipeline是Jenkins2.X的最核心的特性，帮助Jenkins实现从CI到CD与DevOps的转变。 Pipeline的几个概念： Stage：阶段，一个Pipeline可以划分成若干个St...

Posted by Kerwen Blog on September 12, 2019