public virtual bool Contains(IFeature feature)
{
if (Features.Count == 0)
{
return(false);
}
// Since Features can be strongly collection typed we must prevent searching objects of an invalid type
if (FeatureType != null)
{
// test if feature we are looking for is derived from FeatureType
if (!FeatureType.IsAssignableFrom(feature.GetType()))
{
return(false);
}
}
else
{
// if FeatureType is not set use type of first object in collection.
if (Features[0].GetType() != feature.GetType())
{
return(false);
}
}
return(Features.Contains(feature));
}