The 'configuration' element is not declared

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C

C#

Warning Show in VS Express 2013 Desktop

"the 'configuration' element is not declared"

and When i try XML > Schemas > DotNetConfig then this Warning is gone but 3 New Messages Show in Error List

Message 1 Could not find schema information for the element 'supportedRuntime'
Message 2 Could not find schema information for the attribute 'version'
Message 3 Could not find schema information for the attribute 'sku'

What i Do?

What I have tried:


<configuration>
<configsections>

<connectionstrings>
<add name="TestData"
="" connectionstring="Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\Users\HP\Documents\Visual Studio 2013\Projects\Test\TestData.accdb" providername="System.Data.OleDb">

<startup>
<supportedruntime version="v4.0" sku=".NETFramework,Version=v4.5">