Correct way Provide DomSanitizer to Component with Angular 2 RC6

You don't need to declare providers: [ DomSanitizer ] anymore.
Just need to import DomSanitizer as shown below,

import { DomSanitizer, SafeResourceUrl, SafeUrl} from '@angular/platform-browser';

in component inject it through a constructor as below,

constructor(private sanitizer: DomSanitizer) {}

Import these-

import { DomSanitizer, SafeResourceUrl, SafeUrl } from '@angular/platform-browser';

define variable-

trustedDashboardUrl : SafeUrl;

Use it in constructor like this-

constructor(
    private sanitizer: DomSanitizer) {}

Specifiy URL like this-

this.trustedDashboardUrl =
                        this.sanitizer.bypassSecurityTrustResourceUrl
                            ("URL");

See if this helps.