public void InsertRun(DataRun existingRun, DataRun newRun)
{
int idx = DataRuns.IndexOf(existingRun);
if (idx < 0)
{
throw new ArgumentException("Attempt to replace non-existant run", nameof(existingRun));
}
DataRuns.Insert(idx + 1, newRun);
}
public void InsertRun(int index, DataRun newRun)
{
DataRuns.Insert(index, newRun);
}