what changes are needed to made in web.config file to prevent this exception i am using dotnet open id for implementing open id.
using (OpenIdRelyingParty openid = new OpenIdRelyingParty())
{
IAuthenticationRequest request = openid.CreateRequest(this.txtOpenId.Text);
and at this point an exception is generated no openid endpoint found for example in case i am typing claimid.com/openid