https://www.cnblogs.com/feng9exe/p/9712059.html 类型系统(type system)是一门编程语言最核心也是最基础的部分.无论该语言基于何种编程范式,都必须在开天辟地之初首先对类型系统作出明确的定义.这是因为,编程语言虽然五花八门,千奇百怪,但是归根结底,编程语言最终的目标,本质上无非是回答两个问题: 如何表示信息: 如何处理信息.…

1. Unified Type System Scala has a unified type system, enclosed by the type Any at the top of the hierarchy and the type Nothing at the bottom of the hierarchy. All Scala types inherit from Any. # Using Any, Book extends AnyRef, and x is an Int that…

错误: Could not load type 'System.Reflection.AssemblySignatureKeyAttribute' from assembly 'mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c 调试或者在安装了VS2012的电脑上运行没事,但在干净的环境下,就报这个错误. 解决: 查了一下AssemblySignatureKeyAttribute,是.net framework4.…

错误:foreach statement cannot operate on variables of type 'System.Web.UI.WebControls.Table' because 'System.Web.UI.WebControls.Table' does not contain a public definition for 'GetEnumerator' foreach (TableRow tr in table) {   ... } 修改为 foreach (TableR…

Could not load type 'System.ServiceModel.Activation.HttpModule' from assembly 'System.ServiceModel, Version=3.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' 问题描述: 再windows server 2008 r2 环境下搭建.net网站 ,运行是IIS7.0提示以上问题 解决方案: 这里需要注册一下ASP.NET 4.…

在进行类转json字符串时,报错JsonException: Max allowed object depth reached while trying to export from type System.Single. ok,实际上是类的属性中有json不能识别的数据类型. JsonData public JsonData(bool boolean); public JsonData(double number); public JsonData(int number); public Js…

[TypeLoadException: Could not load type 'System.Runtime.CompilerServices.ExtensionAttribute' from assembly 'mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'.] System.ModuleHandle.ResolveType(RuntimeModule module, Int32 typ…

可以强迫部署EntityFramework.SqlServer.dll这个文件到输出目录 找到1个老外的帖子,戳这里(本人测试无效,大家有可能试一下..) 解决方案以下: 在EF的上下文代码CS文件(Model1.Context.cs)中添加这个方法 public void FixEfProviderServicesProblem() { //The Entity Framework provider type 'System.Data.Entity.SqlServer.SqlProviderS…

解决:Could not load type 'System.ServiceModel.Activation.HttpModule' from assembly 'System.ServiceMode 今天我发布项目,获取运行出错如下: Could not load type 'System.ServiceModel.Activation.HttpModule' from assembly 'System.ServiceMode 解决:Could not load type 'System.Se…

Debug 模式下运行程序的时候,Output 窗口出来个错误“A first chance exception of type 'System.ArgumentException' occurred in System.Data.dll”. 但是并没有直接throw错误.无法知道具体在哪一步发生了这个错误. 如果想知道具体的内容,需要enable 这个debug If you do want to know, in Visual Studio -> Debug (main menu) ->…