c# - How to fix Error: "Could not find schema information for the attribute/element" by creating schema

Question

I have a windows forms application written in VS2010 with C# and get the following errors in the app.config file:

Message 4   Could not find schema information for the attribute 'name'
Message 8   Could not find schema information for the attribute 'name'
Message 12  Could not find schema information for the attribute 'name'
Message 5   Could not find schema information for the attribute 'serializeAs'
Message 15  Could not find schema information for the element 'CCP_Utility.Settings1'
Message 2   Could not find schema information for the element 'CCP_Utility.Properties.Settings'
Message 3   Could not find schema information for the element 'setting'
Message 1   Could not find schema information for the element 'userSettings'
Message 6   Could not find schema information for the element 'value'

What do I have to change in the code to fix this issue? Where can I edit what's in CCP_Utility.Settings1 and CCP_Utility.Properties.Settings ?

Here's the app.config code:

<configuration>
<configSections>
    <sectionGroup name="userSettings" type="System.Configuration.UserSettingsGroup, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" >
        <section name="CCP_Utility.Properties.Settings" type="System.Configuration.ClientSettingsSection, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" allowExeDefinition="MachineToLocalUser" requirePermission="false" />
        <section name="CCP_Utility.Settings1" type="System.Configuration.ClientSettingsSection, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" allowExeDefinition="MachineToLocalUser" requirePermission="false" />
    </sectionGroup>
  </configSections>
<userSettings>
  <CCP_Utility.Properties.Settings>
    <setting name="SourceDir" serializeAs="String">
      <value />
    </setting>
    <setting name="TargetDir" serializeAs="String">
      <value />
    </setting>
    <setting name="CorpID" serializeAs="String">
      <value />
    </setting>
  </CCP_Utility.Properties.Settings>
    <CCP_Utility.Settings1>
        <setting name="sourceDir" serializeAs="String">
            <value />
        </setting>
        <setting name="targetDir" serializeAs="String">
            <value />
        </setting>
    </CCP_Utility.Settings1>

   </userSettings>
</configuration>

Answer 1

Quickest, easiest laziest way to solve the problem:

1. Right-click on the project icon in Solution Explorer and choose "Properties".
2. Go to the "Application" tab and choose an earlier .NET target framework.
3. Save changes.
4. Go to the "Application" tab and choose the initial .NET target framework.
5. Save changes => problem solved!