For context classes, there should be an overloaded base(options) constructor. public partial class DatabaseContext : DbContext { publi[......]继续阅读

对于上下文类，要有一个 base(options) 构造函数重载。 public partial class DatabaseContext : DbContext { public DatabaseContext() { }[......]继续阅读

First, switch to the root user and then execute apt-get install software-properties-common Then the following prompts will appear: Reading package li[......]继续阅读

首先要切换到 root 用户，然后执行 apt-get install software-properties-common 然后会出现以下提示 正在读取软件包列表... 完成 正在分析软件包的依赖关系树 正在读取状态信息... 完成 将会同时安装下列软件： liba[......]继续阅读

EF Core 查询中默认是跟踪查询。

EF Core 查询中默认是跟踪查询。

Value type Equals and == are equivalent; For string, after overriding, Equals and == are equivalent; For object type, the specificity of string; For o[......] 继续阅读

值类型 Equals 与 == 等同； string 经过重写， Equals 与 == 等同； object 类型，string 的特殊性； 其他类 类型。 object t = "123"; object a = t;[......]继续阅读

// Set up client HttpClient client = new HttpClient(); client.DefaultRequestHeaders.Authorization =[......]继续阅读

// 设置 client HttpClient client = new HttpClient(); client.DefaultRequestHeaders.Authorization = new[......]继续阅读

dpkg-reconfigure tzdata is a command used in Debian-based Linux distributions to reconfigure the time zone data. When executed, it allows the user to[......] 继续阅读

dpkg-reconfigure tzdata [......] 继续阅读

Create a swap partition bs: size count: quantity sudo dd if=/dev/zero of=/swapfile bs=64M count=16 sudo mkswap /swapfile sudo swapon /swapfile Rem[......] 继续阅读

创建交换分区 bs:大小 count：数量 sudo dd if=/dev/zero of=/swapfile bs=64M count=16 sudo mkswap /swapfile sudo swapon /swapfile 用完后删除交换分区 sudo swapoff /swapfile s[......]继续阅读

https://blog.csdn.net/y353027520dx/article/details/88872643 [......] 继续阅读

https://blog.csdn.net/y353027520dx/article/details/88872643 [......] 继续阅读

Common Value Types Value type variables can be directly assigned a value. They are derived from the class System.ValueType. | Type | Description[......] 继续阅读

常用值类型（Value types） 值类型变量可以直接分配给一个值。它们是从类 System.ValueType 中派生的。 类型 描述 范围 默认值 bool 布尔值 True 或 False False byte 8 位无符号整数 0 到 255 0 char 16 位[......] 继续阅读

public class MyClass { public async Task<int> GetIntAsync() { await Task.FromResult(GetInt()); r[......]继续阅读

public class MyClass { public async Task<int> GetIntAsync() { await Task.FromResult(GetInt()); r[......]继续阅读