protected override IAsyncResult OnBeginGetToken(string appliesTo, string action, TimeSpan timeout, AsyncCallback callback, object state) { base.ValidateAction(action); Uri stsUri = TokenProviderHelper.GetStsUri(this.stsUri, appliesTo); TokenProviderHelper.TokenResult <SecurityToken> accessTokenByAssertion = TokenProviderHelper.GetAccessTokenByAssertion(stsUri, appliesTo, this.SimpleWebToken, "SWT", timeout); return(new CompletedAsyncResult <TokenProviderHelper.TokenResult <SecurityToken> >(accessTokenByAssertion, callback, state)); }