/// <summary>
/// 创建一个数据上下文实例
/// </summary>
/// <param name="args">参数</param>
/// <returns></returns>
public virtual TDbContext CreateDbContext(string[] args)
{
string migrationAssemblyName = GetType().Assembly.GetName().Name;
ServiceExtensions.MigrationAssemblyName = migrationAssemblyName;
Console.WriteLine($@"MigrationAssembly: {migrationAssemblyName}");
ServiceProvider = ServiceProvider ?? CreateDesignTimeServiceProvider();
IEntityManager entityManager = ServiceProvider.GetService <IEntityManager>();
entityManager.Initialize();
DbContextOptionsBuilder builder = new DbContextOptionsBuilder <TDbContext>();
builder = ServiceProvider.BuildDbContextOptionsBuilder <TDbContext>(builder);
TDbContext context = (TDbContext)ActivatorUtilities.CreateInstance(ServiceProvider, typeof(TDbContext), builder.Options);
return(context);
}