Visual Studio warning configuration element is not declared

Visual Studio warning configuration element is not declared

Visual Studio warning

Error

• When you open your Visual Basic Project, and navigate to App.config file for editing, you notice that <configuration> is underlined with blue line. When the cursor hovers, you see this message ( The 'configuration' element is not declared ).

configuration element is not declared

Solution

• Open your VB.Net Project.
• From XML menu, choose Schemas..

App.Config - configuration element solution

• From XML Schemas, look for DotNetConfig.xsd
• From Dropdown Use, choose Use this schema
• Click OK.

vb.net - app.Config - configuration solution

Create your own App.config file, Set Value, Get Value

• You need to add reference to Configuration.dll in your project.
• Create Class MyConfigs.vb

	Imports System.Configuration
	Imports System.Reflection
	Public Class MyConfigs
	Private _config As Configuration
	Private _settings As AppSettingsSection
	Public Function GetProperty(propertyName As String) As String
	Return _settings.Settings.Item(propertyName).Value
	End Function
	Public Sub SetProperty(propertyName As String, propertyValue As String)
	_settings.Settings.Item(propertyName).Value = propertyValue
	End Sub
	Public Sub New()
	_config = ConfigurationManager.OpenExeConfiguration(Assembly.GetEntryAssembly().Location)
	_settings = _config.AppSettings
	End Sub
	Protected Overrides Sub Finalize()
	MyBase.Finalize()
	_config.Save(ConfigurationSaveMode.Modified)
	End Sub
	End Class
	'How to create config from Form
	Public Class MainForm
	Private Sub MainForm_Load(sender As Object, e As EventArgs) Handles MyBase.Load
	Dim _appConfig As New AppConfig
	_appConfig.SetProperty(propertyName, propertyValue)
	_appConfig.GetProperty(propertyName)
	End Sub
	End Class

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