Achieve ADDorUpdate() using EF Core

Question

Hello Experts, 

 

I want to achieve the ADDorUpdate() method in Generic repository using EF Core like below?

Can anyone help me?

public virtual void AddOrUpdate(T entity)

{

#region Argument Validation

if (entity == null)

{

throw new ArgumentNullException("entity");

}

#endregion

DbSet.AddOrUpdate(e => e.Id, entity);

this.DbContext.SaveChanges();

}