App.config

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <configSections>
    <sectionGroup name="elmah">
      <section name="security" requirePermission="false" type="Elmah.SecuritySectionHandler, Elmah"/>
      <section name="errorLog" requirePermission="false" type="Elmah.ErrorLogSectionHandler, Elmah"/>
      <section name="errorMail" requirePermission="false" type="Elmah.ErrorMailSectionHandler, Elmah"/>
      <section name="errorFilter" requirePermission="false" type="Elmah.ErrorFilterSectionHandler, Elmah"/>
    </sectionGroup>
  </configSections>
    <startup> 
        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.7.2"/>
    </startup>
  <connectionStrings>
    <add name="ElmahElasticSearch" connectionString="Nodes=http://localhost:9200;DefaultIndex=elmah-console${yyyy.MM};Username=elmahUser;Password=elmahPass"/>
  </connectionStrings>
  <elmah>
    <errorLog type="Elmah.Io.ElasticSearch.ElasticSearchErrorLog, Elmah.Io.ElasticSearch, Version=1.0.0.0, Culture=neutral" connectionStringName="ElmahElasticSearch" applicationName="ElmahElasticSearchSampleWebsite" environmentName="development" customerName="sample customer"/>
  </elmah>  
</configuration>