private IQueryable <T> ApplySpecification(ISpecification <T> spec)
{
return(SpecificationEvaluater <T> .GetQuery(_context.Set <T>().AsQueryable(), spec));
}
public async Task <T> GetEntityExpression(Expression <Func <T, bool> > exp)
{
return(await SpecificationEvaluater <T> .GetQuery(_context.Set <T>().AsQueryable(), exp).FirstOrDefaultAsync());
}