internal class MyClientCredentialsSecurityTokenManager : 
    ClientCredentialsSecurityTokenManager
{
    MyClientCredentials credentials;

    public MyClientCredentialsSecurityTokenManager(MyClientCredentials credentials)
        : base(credentials)
    {
        this.credentials = credentials;
    }

    public override SecurityTokenProvider CreateSecurityTokenProvider(
        SecurityTokenRequirement tokenRequirement)
    {
        // Return your implementation of the SecurityTokenProvider, if required.
        // This implementation delegates to the base class.
        return base.CreateSecurityTokenProvider(tokenRequirement);
    }

    public override SecurityTokenAuthenticator CreateSecurityTokenAuthenticator(
        SecurityTokenRequirement tokenRequirement, out SecurityTokenResolver outOfBandTokenResolver)
    {
        // Return your implementation of the SecurityTokenAuthenticator, if required.
        // This implementation delegates to the base class.
        return base.CreateSecurityTokenAuthenticator(tokenRequirement, out outOfBandTokenResolver);
    }

    public override SecurityTokenSerializer CreateSecurityTokenSerializer(SecurityTokenVersion version)
    {
        // Return your implementation of the SecurityTokenSerializer, if required.
        // This implementation delegates to the base class.
        return base.CreateSecurityTokenSerializer(version);
    }
}