How we can redirect to the another page in custom Form Handler Module?

Hi folks, I have a custom Module to handle the form's data after insert. Basically, I will submit data to Salesforce then receive and the URL from Salesforce response. And I want to redirect the current page to the URL.

Many thanks for your help!

 private void FormItem_InsertAfterHandler(object sender, BizFormItemEventArgs e)
    {
        string SalesForceOID = SettingsKeyInfoProvider.GetValue($"{SiteContext.CurrentSiteName}.{Constants.SalesforceConfigs.SalesforceOID}");

        // Gets the form data object from the event handler parameter
        BizFormItem formDataItem = e.Item;
        string[] excludedFields = Array.ConvertAll(SettingsKeyInfoProvider.GetValue($"{SiteContext.CurrentSiteName}.{Constants.SalesforceConfigs.ExcludedFormFields}").Split(','), p => p.Trim());
        // Checks that the form record was successfully created
        if (formDataItem != null)
        {
            var submitData = new StringBuilder();
            submitData.AppendFormat("oid={0}", SalesForceOID);
            foreach (var item in formDataItem.ColumnNames)
            {
                if (Array.IndexOf(excludedFields, item) == -1)
                {
                    var fieldData = formDataItem.GetStringValue(item, "");
                    if (!string.IsNullOrEmpty(fieldData))
                    {
                        submitData.AppendFormat("&{0}={1}", item, fieldData);
                    }
                }
            }
            var result = PostWebToLead(submitData.ToString());
            //I want to redirect to the new page in here
        }
    }