private void CreateEnvelopeBody(ushort? versionTypeNumber, ushort? minorVersionTypeNumber) { this.requestEnvelope = new EnvelopeBody(); this.requestEnvelope.RequestVersion = this.CreateRequestVersion(versionTypeNumber, minorVersionTypeNumber); this.requestEnvelope.RequestCollection = new RequestCollection(); this.requestEnvelope.RequestCollection.CorrelationId = Guid.NewGuid().ToString(); }