Exception of type 'System.ArgumentException' was thrown. Parameter name: newObj when register sts to sharepoint 2010

Question

Hi
when i register my custom sts to sharepoint i receive error : 
Exception of type 'System.ArgumentException' was thrown.
Parameter name: newObj
i followed https://msdn.microsoft.com/EN-US/library/office/ff955607(v=office.14).aspx
private void button1_Click(object sender, EventArgs e)
List<SPTrustedClaimTypeInformation> claimMapping = new List<SPTrustedClaimTypeInformation>();
List<string> strClaimMapping = new List<string>();
SPTrustedClaimTypeInformation idClaim = new SPTrustedClaimTypeInformation("EmailAddress",
"http://schemas.xmlsoap.org/ws/2005/05/identity/claims/emailaddress",
"http://schemas.xmlsoap.org/ws/2005/05/identity/claims/emailaddress");
SPTrustedClaimTypeInformation titleClaim = new SPTrustedClaimTypeInformation("Title",
"http://schemas.wingtip.com/sharepoint/2009/08/claims/title",
"http://schemas.wingtip.com/sharepoint/2009/08/claims/title");
titleClaim.AcceptOnlyKnownClaimValues = true;
idClaim.AddKnownClaimValue("[email protected]");
idClaim.AddKnownClaimValue("[email protected]");
idClaim.AddKnownClaimValue("[email protected]");
titleClaim.AddKnownClaimValue("Engineer");
titleClaim.AddKnownClaimValue("Manager");
titleClaim.AddKnownClaimValue("CEO");
// Create the string[] for all claims. This is required for
// the construction of the SPTrustedLoginProvider object.
strClaimMapping.Add(idClaim.InputClaimType);
strClaimMapping.Add(titleClaim.InputClaimType);
X509Certificate2 ImportTrustCertificate = new X509Certificate2(@"C:\SPPROJECTS\STS\ClaimsWalkthrough\Resources\STSTestCertPub.cer");
claimMapping.Add(idClaim);
claimMapping.Add(titleClaim);
SPSecurityTokenServiceManager manager = SPSecurityTokenServiceManager.Local;
SPTrustedLoginProvider provider = new SPTrustedLoginProvider(manager,
"WingtipSTS", "WingtipSTS", new Uri("http://localhost:97/default.aspx"),
"https://portal.test.com:90/_trust/", strClaimMapping.ToArray(), idClaim);
foreach (SPTrustedClaimTypeInformation claimTypeInfo in claimMapping)
if (claimTypeInfo.InputClaimType == provider.IdentityClaimTypeInformation.InputClaimType)
continue;
provider.AddClaimTypeInformation(claimTypeInfo);
if (ImportTrustCertificate != null)
provider.SigningCertificate = ImportTrustCertificate;
//provider.ClaimProviderName = "ContosoCRMClaimProvider";
provider.UseWReplyParameter = true;
manager.TrustedLoginProviders.Add(provider);
manager.Update();
adil

Answer 1

After spending the last hour looking again at my FBA issue, i finally got the answer to my own question which is SPClaimsUtility.
For anyone in the future having this issue, this is a snapshot from my code:
SPSecurity.RunWithElevatedPrivileges(delegate()
               string usernamestring = GetTextBox("tbUsername").Text;
               string passwordstring = GetTextBox("tbPassword").Text;
ATPAuthProvider.ATPMembershipProvider memProvider = new ATPAuthProvider.ATPMembershipProvider();
if (memProvider.ValidateUser(usernamestring, passwordstring))
                       MembershipUser user = memProvider.GetUser(usernamestring,
true);
                       if (user != null)
  bool Status = SPClaimsUtility.AuthenticateFormsUser(HttpContext.Current.Request.UrlReferrer,
usernamestring, passwordstring);
                           if (Status)
                               HttpContext.Current.Response.Redirect("/Pages/Home.aspx", false);
Note: The SPClaimsUtility class is from the Microsoft.SharePoint.IdentityModel dll which reside in the new GAC location: C:\Windows\Microsoft.NET\assembly\GAC_MSIL\Microsoft.SharePoint.IdentityModel\v4.0_15.0.0.0__71e9bce111e9429c
Credit to Sivarajan's blog: http://sivarajan.me/post/SharePoint-2013-Enabling-Custom-Login-Page-and-Mixed-Contents-Part-2
Enjoy!