PTV Logistics Product Forum

Is there a dark map or a night mode map for wpfmap control ?

I try to calculate route but always I have this error message - "linking to waypoint (zero-based index list: unknown) failed".
Below is my code.
public class Location
{
public Location(double latitude, double longitude)
{
this.Latitude = latitude;
this.Longitude = Longitude;
}

/// <summary ...