public void removeContributor(Contributor contributor)
{
if (contributor == null)
{
throw new ArgumentNullException("In abstract class MusicSelection, method removeContributor(). Argument cannot be null.");
}
if (this.Contributors.Exists(c => c.Role == contributor.Role && c.getFullName() == contributor.getFullName()))
{
this.Contributors.RemoveAt
(
this.Contributors.FindIndex(c => c.Role == contributor.Role &&
c.getFullName() == contributor.getFullName())
);
}
else
{
throw new ArgumentException("In class MusicSelection, method removeContributor(). Unable to remove contributor that does not exist in the list.");
}
}
public void addContributor(Contributor contributor)
{
if (contributor == null)
{
throw new ArgumentNullException("In abstract class MusicSelection, method addContributor(). Argument cannot be null.");
}
if (this.Contributors.Exists(c => c.Role == contributor.Role && c.getFullName() == contributor.getFullName()))
{
return;
}
this.Contributors.Add(contributor);
}