private void Seed()
{
using var context = new ApplicationDb(ContextOptions);
context.Database.EnsureDeleted();
context.Database.EnsureCreated();
var category1 = new CategoryData {
Name = "One"
};
var category2 = new CategoryData {
Name = "Two", SupCategoryData = category1
};
var category3 = new CategoryData {
Name = "Three", SupCategoryData = category2
};
context.AddRange(category1, category2, category3);
context.SaveChanges();
}