System.ServiceModel 4.0.0.0 System.IdentityModel.Selectors.SecurityTokenAuthenticator This authenticator validates only SecurityContextSecurityTokens. Validates tokens and extracts claims. Constructor 4.0.0.0 This authenticator validates only SecurityContextSecurityTokens. Initializes a new instance of the class. Method 4.0.0.0 System.Boolean To be added. Gets a value that indicates whether a specified token can be validated. true if the specified token can be validated; otherwise, false. The . Method 4.0.0.0 System.Collections.ObjectModel.ReadOnlyCollection<System.IdentityModel.Policy.IAuthorizationPolicy> To be added. Validates a specified token. A collection of instances. The .