<connectionStrings>
  <remove name="LocalSqlServer" />
   <!-- DEVELOPMENT - SQLEXPRESS -->
    <add name="ApplicationServices" connectionString="data source=.\SQLEXPRESS;Integrated Security=True;AttachDbFilename=|DataDirectory|\ASPNETDB.MDF;User Instance=True" providerName="System.Data.SqlClient" />
  
  <!-- PRODUCTION - SQLSERVER -->
  <add name="ApplicationServices" connectionString="Data Source=MACHINE_NAME;Initial Catalog=DataBaseName;Integrated Security=True" providerName="System.Data.SqlClient" />
</connectionStrings>

xml

1

Web.config ASP.NET MVC SQL SERVER/EXPRESS - Development x Production

<connectionStrings>
  <remove name="LocalSqlServer" />
   <!-- DEVELOPMENT - SQLEXPRESS -->
    <add name="ApplicationServices" connectionString="data source=.\SQLEXPRESS;Integrated Security=True;AttachDbFilename=|DataDirectory|\ASPNETDB.MDF;User Instance=True" providerName="System.Data.SqlClient" />
  
  <!-- PRODUCTION - SQLSERVER -->
  <add name="ApplicationServices" connectionString="Data Source=MACHINE_NAME;Initial Catalog=DataBaseName;Integrated Security=True" providerName="System.Data.SqlClient" />
</connectionStrings>

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• .net, 
• asp, 
• express, 
• mvc, 
• server, 
• sql, 
• web.config

in web.config
Under the ...<system.web>
    <identity impersonate="true" userName="ludicco" password="s4lv4d0rd4l1" />

xml

1

ASP MVC MS SQL Fix in Webconfig

in web.config
Under the ...<system.web>
    <identity impersonate="true" userName="ludicco" password="s4lv4d0rd4l1" />

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• .net, 
• asp, 
• iis, 
• mvc, 
• sql