public override void Add(ProviderBase provider)
{
Assert.ArgumentNotNull((object)provider, nameof(provider));
LocationFallbackProviderBase provider1 = provider as LocationFallbackProviderBase;
Assert.IsNotNull((object)provider1, "The provider type passed to LocationProviderCollection is not assignable to LocationProviderBase. Actual type: {0}", (object)provider.GetType().FullName);
this.Add(provider1);
}
public virtual void Add(LocationFallbackProviderBase provider)
{
Assert.ArgumentNotNull((object)provider, nameof(provider));
base.Add((ProviderBase)provider);
}