<appSettings>
    <add key="customsetting1" value="Some text here"/>
    <add key="customsetting2" value="Some text here1"/>
    <add key="customsetting3" value="Some text here2"/>
  </appSettings>  
</configuration>

Dim rootWebConfig1 As System.Configuration.Configuration
        rootWebConfig1 = System.Web.Configuration.WebConfigurationManager.OpenWebConfiguration(Nothing)        
Return rootWebConfig1.AppSettings.Settings.Count.ToString()

Return rootWebConfig1.ConnectionStrings.ConnectionStrings( 0 ).ToString()

<?xml version="1.0" encoding="UTF-8"?>
<!--
    Note: As an alternative to hand editing this file you can use the 
    web admin tool to configure settings for your application. Use
    the Website->Asp.Net Configuration option in Visual Studio.
    A full list of settings and comments can be found in 
    machine.config.comments usually located in 
    \Windows\Microsoft.Net\Framework\v2.x\Config 
-->


<configuration>


  <configSections>
    
		<sectionGroup name="system.web.extensions" type="System.Web.Configuration.SystemWebExtensionsSectionGroup, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35">
			<sectionGroup name="scripting" type="System.Web.Configuration.ScriptingSectionGroup, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35">
				<section name="scriptResourceHandler" type="System.Web.Configuration.ScriptingScriptResourceHandlerSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="MachineToApplication" />
				<sectionGroup name="webServices" type="System.Web.Configuration.ScriptingWebServicesSectionGroup, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35">
					<section name="jsonSerialization" type="System.Web.Configuration.ScriptingJsonSerializationSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="Everywhere" />
					<section name="profileService" type="System.Web.Configuration.ScriptingProfileServiceSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="MachineToApplication" />
					<section name="authenticationService" type="System.Web.Configuration.ScriptingAuthenticationServiceSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="MachineToApplication" />
					<section name="roleService" type="System.Web.Configuration.ScriptingRoleServiceSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="MachineToApplication" />
				</sectionGroup>
			</sectionGroup>
		</sectionGroup>
	</configSections>


  
  
  
	<system.web>
		<!--
            Set compilation debug="true" to insert debugging 
            symbols into the compiled page. Because this 
            affects performance, set this value to true only 
            during development.

            Visual Basic options:
            Set strict="true" to disallow all data type conversions 
            where data loss can occur. 
            Set explicit="true" to force declaration of all variables.
        -->
		<compilation debug="true" strict="false" explicit="true">
			<assemblies>
				<add assembly="System.Core, Version=3.5.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089" />
				<add assembly="System.Xml.Linq, Version=3.5.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089" />
				<add assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
				<add assembly="System.Data.DataSetExtensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089" />
			</assemblies>
		</compilation>
		<pages>
			<namespaces>
				<clear />
				<add namespace="System" />
				<add namespace="System.Collections" />
				<add namespace="System.Collections.Specialized" />
				<add namespace="System.Configuration" />
				<add namespace="System.Runtime.Serialization" />
				<add namespace="System.ServiceModel" />
				<add namespace="System.Text" />
				<add namespace="System.Text.RegularExpressions" />
				<add namespace="System.Linq" />
				<add namespace="System.Web" />
				<add namespace="System.Web.Caching" />
				<add namespace="System.Web.SessionState" />
				<add namespace="System.Web.Security" />
				<add namespace="System.Web.Profile" />
				<add namespace="System.Web.UI" />
				<add namespace="System.Web.UI.WebControls" />
				<add namespace="System.Web.UI.WebControls.WebParts" />
				<add namespace="System.Web.UI.HtmlControls" />
			</namespaces>
			<controls>
				<add tagPrefix="asp" namespace="System.Web.UI" assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
			</controls>
		</pages>
		<!--
            The <authentication> section enables configuration 
            of the security authentication mode used by 
            ASP.NET to identify an incoming user. 
        -->
		<authentication mode="Windows" />
		<!--
            The <customErrors> section enables configuration 
            of what to do if/when an unhandled error occurs 
            during the execution of a request. Specifically, 
            it enables developers to configure html error pages 
            to be displayed in place of a error stack trace.

        <customErrors mode="RemoteOnly" defaultRedirect="GenericErrorPage.htm">
            <error statusCode="403" redirect="NoAccess.htm" />
            <error statusCode="404" redirect="FileNotFound.htm" />
        </customErrors>
        -->
		<httpHandlers>
			<remove verb="*" path="*.asmx" />
			<add verb="*" path="*.asmx" validate="false" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
			<add verb="*" path="*_AppService.axd" validate="false" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
			<add verb="GET,HEAD" path="ScriptResource.axd" type="System.Web.Handlers.ScriptResourceHandler, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" validate="false" />
		</httpHandlers>
		<httpModules>
			<add name="ScriptModule" type="System.Web.Handlers.ScriptModule, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
		</httpModules>
	</system.web>
	<system.codedom>
		<compilers>
			<compiler language="c#;cs;csharp" extension=".cs" warningLevel="4" type="Microsoft.CSharp.CSharpCodeProvider, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
				<providerOption name="CompilerVersion" value="v3.5" />
				<providerOption name="WarnAsError" value="false" />
			</compiler>
			<compiler language="vb;vbs;visualbasic;vbscript" extension=".vb" warningLevel="4" type="Microsoft.VisualBasic.VBCodeProvider, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
				<providerOption name="CompilerVersion" value="v3.5" />
				<providerOption name="OptionInfer" value="true" />
				<providerOption name="WarnAsError" value="false" />
			</compiler>
		</compilers>
	</system.codedom>
 <!--
        The system.webServer section is required for running ASP.NET AJAX under Internet
        Information Services  7 . 0 .  It is not necessary for previous version of IIS.
    -->
	<system.webServer>
		<validation validateIntegratedModeConfiguration="false" />
		<modules>
			
		</modules>
		<handlers>
			<remove name="WebServiceHandlerFactory-Integrated" />
			
			
			
		</handlers>
        <directoryBrowse enabled="true" />
	</system.webServer>
	<system.serviceModel>
		<services>
   <service behaviorConfiguration="ServiceBehavior" name="File">
    <endpoint address="" binding="wsHttpBinding" contract="IFile">
     <identity>
      <dns value="localhost" />
     </identity>
    </endpoint>
    <endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange" />
   </service>
  </services>
		<behaviors>
			<serviceBehaviors>
				<behavior name="ServiceBehavior">
					<!-- To avoid disclosing metadata information, set the value below to false and remove the metadata endpoint above before deployment -->
					<serviceMetadata httpGetEnabled="true" />
					<!-- To receive exception details in faults for debugging purposes, set the value below to true.  Set to false before deployment to avoid disclosing exception information -->
					<serviceDebug includeExceptionDetailInFaults="true" />
				</behavior>
			</serviceBehaviors>
		</behaviors>
	</system.serviceModel>



  <appSettings>
    <add key="customsetting1" value="Some text here"/>
  </appSettings>


</configuration>

Public Function ReadConnectionString() As String Implements IFile.ReadConnectionString

Dim rootWebConfig1 As System.Configuration.Configuration
        rootWebConfig1 = System.Web.Configuration.WebConfigurationManager.OpenWebConfiguration(Nothing)
        Return rootWebConfig1.AppSettings.Settings.Count.ToString()

End Sub

Dim WCFService As ServiceReference1.FileClient = New ServiceReference1.FileClient()

MessageBox.Show(WCFService.ReadConnectionString())

Public Function ReadConnectionString() As String Implements IFile.ReadConnectionString

Dim rootWebConfig1 As System.Configuration.Configuration = System.Web.Configuration.WebConfigurationManager.OpenWebConfiguration(Nothing)
        Return rootWebConfig1.ConnectionStrings.ConnectionStrings( 0 ).ToString()

End Function

Return System.Configuration.ConfigurationManager.ConnectionStrings("MyConnectionString").ToString()