How to create Window media encoder media profile?

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C#

media

I try to create a profile for Video. Because I don't know how to create, I follow the Windows media Encoder and make this method.

private void createNewProfie() {
             this.newProfile = new WMEncProfile2();
             this.newProfile.ContentType = 17;
            newProfile.set_InterlaceMode(0,true);
             this.newProfile.set_VBRMode(WMENC_SOURCE_TYPE.WMENC_AUDIO, 0, WMENC_PROFILE_VBR_MODE.WMENC_PVM_NONE);
             this.newProfile.set_VBRMode(WMENC_SOURCE_TYPE.WMENC_VIDEO, 0, WMENC_PROFILE_VBR_MODE.WMENC_PVM_NONE);


             newProfile.AddAudience(100000);
            IWMEncAudienceObj audience= newProfile.get_Audience(0);
            audience.SetAudioConfig(0,1,8000,8000,16);
            
        }

I show error "value does not fall within the expected range" when

Encoder.run();

What I have to change or any additional config?