Learn, Troubleshoot BizTalk with Ashok Rajpurohit

Overriding ConnectionString in Machine.config with web.config connectionstring. If I have following connectionstring in my machine.config  (Machine level value) <connectionStrings>                  <add name="TestConfigConnection" connectionString="DATA SOURCE=machineCon;PERSIST SECURITY INFO=True;USER ID=usr;PASSWORD=pwd" />  </connectionStrings> Now for specific web application I want a different connection string value then we need to override the value in machine.config. So we  need to add the required connectionstring value in web.config <connectionStrings>                  <add name="TestConfigConnection" connectionString="DATA SOURCE=webCon;PERSIST SECURITY INFO=True;USER ID=usr;PASSWORD=pwd" />  </connectionStrings> But with this, it will give an error in browser that Parser Error Message: The entry 'TestConfigConnection' has already been added. Means when