public CrossDomainMiddleware(OwinMiddleware next, CrossDomainOptions crossDomainOptions)
     : base(next)
 {
     _crossDomainOptions = crossDomainOptions ?? new CrossDomainOptions();
 }
 public CrossDomainMiddleware(OwinMiddleware next, CrossDomainOptions crossDomainOptions)
     : base(next)
 {
     _crossDomainOptions = crossDomainOptions ?? new CrossDomainOptions();
 }