Remove duplicates items in List

Question

I created a WebAPI and its calling an SQL Server to get my data. I created a List<> to populate and get those items back to UI. However, in my output there are duplicates due to the data. Is there a way to remove the duplicate strings before passing
it back to my UI?
I'm reading through the data coming back from SQL here
while (reader.Read())
Jobs jobs= new Jobs();
jobs.FunctionDesc = reader.GetString(0);
jobs.Function = reader.GetString(1);
jobss.Add(jobs);
}return jobs
is there a way I can remove the duplicate FunctionDesc prior to returning it back to the UI?

Answer 1

You could keep populating the List<Jobs> exactly like you are doing now, create a class that implements the IEqualityComparer<Jobs> interface and simply pass an instance of this one to the Distinct method that you call on the list once you have
populated it:
public class JobsComparer : IEqualityComparer<Jobs>
public bool Equals(Jobs x, Jobs y)
return x.FunctionDesc.Equals(y.FunctionDesc);
public int GetHashCode(Jobs obj)
return obj.FunctionDesc.GetHashCode();
while (reader.Read())
Jobs jobs= new Jobs();
jobs.FunctionDesc = reader.GetString(0);
jobs.Function = reader.GetString(1);
jobss.Add(jobs);
jobss = jobss.Distinct(new JobsComparer()).ToList();
return jobss;
This will effectively remove all duplicates with minimal changes to your current code.
Hope that helps.
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