Hi my mvc class include Data Annotation [Index] but After updating the visual studio, my [Index] Data Annotation not working and not working unique.
How i am fixed that code ?
public class MaterialSupplier
{
    public int MaterialSupplierID { get; set; }
    [Index("IX_MaterialSupplier", 1, IsUnique = true)]
    public int MaterialID { get; set; }
    [Index("IX_MaterialSupplier", 2, IsUnique = true)]
    public int SupplierID { get; set; }
    [Required]
    public decimal UnitPrice { get; set; }
    [DefaultValue(0)]
    public bool IsDeleted { get; set; }
    public virtual Material Material { get; set; }
    public virtual Supplier Supplier { get; set; }
    public virtual ICollection<MaterialOrderDetail> MaterialOrderDetails { get; set; }
}