Force by config to use tls 1.0 in a wcf client c# -

we have web app has client implemented wcf. client uses ssl_lvl3 make handshake external service. turns out service disabled ssl_lvl3, need change tls 1.0. there way force tls security in c#:

servicepointmanager.securityprotocol = securityprotocoltype.tls; 

but changes security of services used app , not services accept tls.

what change web.config force wcf service use tls. there way this?

this binding of service:

<binding name="xxxx" closetimeout="00:01:00" opentimeout="00:01:00"      receivetimeout="00:10:00" sendtimeout="00:01:00" allowcookies="false"       bypassproxyonlocal="false" namecomparisonmode= "strongwildcard"      maxbufferpoolsize="524288" maxbuffersize="655360"      maxreceivedmessagesize="655360" textencoding="utf-8"     transfermode="buffered" usedefaultwebproxy="true"       messageencoding="text">     <security mode="transport" />  </binding> 

<custombinding >   <binding name="cussoap">                          <sslstreamsecurity requireclientcertificate="true"   sslprotocols="ssl3|tls|tls11|tls12" />                             </binding> 

but available in visual studio 2015(.net framework 4.5.2)