<PackageReference Include="Microsoft.Identity.Client" Version="4.84.2-preview" />

Microsoft.Identity.Client.WsTrust.WsTrustWebRequestManager

public Task<MexDocument> GetMexDocumentAsync(string federationMetadataUrl, RequestContext requestContext, string federationMetadata = null)

public Task<UserRealmDiscoveryResponse> GetUserRealmAsync(string userRealmUriPrefix, string userName, RequestContext requestContext)

public Task<WsTrustResponse> GetWsTrustResponseAsync(WsTrustEndpoint wsTrustEndpoint, string wsTrustRequest, RequestContext requestContext)