Entity Framework core 5 - Many to Many Relationship

BlogEntry.cs

   public class BlogEntry
   {
      [Key]
      public string Id { get; set; }
      [Required]
      [MaxLength(200)]
      public string Title { get; set; }
      [Required]
      public string Text { get; set; }
			
      public ICollection<Category> Categories { get; set; } 
   }

Category.cs

   public class Category
   {
      [Key]
      [Column(TypeName = "VARCHAR")]
      [StringLength(100)]
      public string Name { get; set; }
      
      public ICollection<BlogEntry> BlogEntries { get; set; }
   }

DbContext.cs

      public DbSet<BlogEntry> BlogEntries { get; set; }
      public DbSet<Category> Categories { get; set; }