The configuration element is not declared

Question

I\'m doing some work in Visual Studio 2012 Express Edition. I have added an App.config XML file as follows:

Answer 1

I also got the same warning. After thinking about for some time I realized my error working with SQL (MS SQL).

Warning: the 'configuration' element is not declared

Using C#

App.Config code:

*this calls out the database name in the connectionStrings, when I plugged in my SQL code as a practice I always use the database name, schema, then table. This practice didn't carry over well in Visual Studio as I am a beginner. I removed the db name from my SQL syntax and only called from the schema, data table. This resolved the issue for me.

Form.CS:

 using (SqlCommand cmd = new SqlCommand("SELECT * FROM [DatabaseName].[Schema].[TableName] WHERE [MEPeriod] = '2020-06-01'", con))

Updated to:

using (SqlCommand cmd = new SqlCommand("SELECT * FROM [Schema].[TableName] WHERE [MEPeriod] = '2020-06-01'", con))

This worked for me, I hope this is found as useful.