Concatenate in C# Repository

Question

I'm trying to concatenate the value of scoreField but I'm getting null value. Here's my code:

public List<PlainBrgMetric> GetPlainBrgMetricForSortBy(long programID)
{
    return _context.metrics
          .Where(m => m.programLOBID == programID)
          .Select(m => new PlainBrgMetric
          {
              label = m.label,
              scoreField = "s" + m.metrictNumber
          }).ToList();
}

public int? metrictNumber { get; set; }       
public string scoreField { get; set; }

Answer 1

If metricNumber is null... you will get null... try

scorefield = "s" + m.metricNumber?? "";

or another way to write it is

scorefield= "s" + (m.metricNumber == null? "" : m.metricNumber);

Now, when metric number is null, you will just get "s"