Dave Sussman

Right. I wasn't sure whether you meant the physical web.config file, or the values as loaded at runtime. Try

            Configuration configFile = System.Web.Configuration.WebConfigurationManager.OpenWebConfiguration("~");
 
            System.Web.Configuration.MembershipSection section =
                (System.Web.Configuration.MembershipSection)configFile.GetSection("system.web/membership");
            ProviderSettings settings = section.Providers["AspNetSqlMembershipProvider"];
 
            settings.Parameters["minRequiredPasswordLength"] = "3";
            settings.Parameters["minRequiredNonalphanumericCharacters"] = "3";
 
            configFile.Save();

Hi I tried almost this code (not exact) and I fall down into errors today in noon. And then I had to restore the config file again.

So I want to know is it the safest way to update web.config file or try something else.

Thanks