操作sqlite

- Microsoft.EntityFrameworkCore
- Microsoft.EntityFrameworkCore.Design
- Microsoft.EntityFrameworkCore.Sqlite

```java
// 定义实体
public class Student
{
   public long Id { set; get; }
   public string Name { set; get; }
}
```
```java
// 实体配置
public class StudentConfig : IEntityTypeConfiguration<Student>
{
    public void Configure(EntityTypeBuilder<Student> builder)
    {
        builder.ToTable("MY_STUDENT");
        builder.Property(e => e.Name).HasColumnName("MYNAME");

}
}
```
```java
//数据库上下文设置
public class MyDbContext : DbContext
{
    public DbSet<Student> Students { set; get; }

protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
    {
        base.OnConfiguring(optionsBuilder);
        optionsBuilder.UseSqlite(connectionString: "Data Source=KnowledgeDataBase.sqlite;");
    }

protected override void OnModelCreating(ModelBuilder modelBuilder)
    {
        base.OnModelCreating(modelBuilder);
        modelBuilder.ApplyConfigurationsFromAssembly(this.GetType().Assembly);
    }
}
```
```java
//操作示例
static void Main(string[] args)
{
    Student stu = new Student();
    stu.Name = "zxy";
    MyDbContext myDbContext = new MyDbContext();
    myDbContext.Add(stu);
    myDbContext.SaveChanges();

}
```