I have visual studio 2012 professional edition installed.
I tried to open an project file in MCTS EXAM 70-503 Training Kit that is used Visual Studio 2008, then it gives me the error
"cannot be opened because its project type (.csproj) is not supported by this version of the application. To open it, please use a version that supports this type of project."
I heard that Visual Studio could convert it automatically to the current version but the conversion wizard didn't show at all.
Here is the project sample file.
<Project ToolsVersion="3.5" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003"><PropertyGroup><Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration><Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform><ProductVersion>9.0.20706</ProductVersion><SchemaVersion>2.0</SchemaVersion><ProjectGuid>{CE433208-AE09-4314-A6EF-23663BAC3179}</ProjectGuid><OutputType>Library</OutputType><AppDesignerFolder>Properties</AppDesignerFolder><RootNamespace>Tasks.Services</RootNamespace><AssemblyName>Tasks.Services</AssemblyName><ProjectTypeGuids>{3D9AD99F-2412-4246-B90B-4EAA41C64699};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}</ProjectTypeGuids><StartArguments>/client:"WcfTestClient.exe"</StartArguments><TargetFrameworkVersion>v3.5</TargetFrameworkVersion></PropertyGroup><PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' "><DebugSymbols>true</DebugSymbols><DebugType>full</DebugType><Optimize>false</Optimize><OutputPath>bin\Debug\</OutputPath><DefineConstants>DEBUG;TRACE</DefineConstants><ErrorReport>prompt</ErrorReport><WarningLevel>4</WarningLevel></PropertyGroup><PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' "><DebugType>pdbonly</DebugType><Optimize>true</Optimize><OutputPath>bin\Release\</OutputPath><DefineConstants>TRACE</DefineConstants><ErrorReport>prompt</ErrorReport><WarningLevel>4</WarningLevel></PropertyGroup><ItemGroup><Reference Include="System" /><Reference Include="System.Core"><RequiredTargetFramework>3.5</RequiredTargetFramework></Reference><Reference Include="System.Data" /><Reference Include="System.Runtime.Serialization"><RequiredTargetFramework>3.0</RequiredTargetFramework></Reference><Reference Include="System.ServiceModel"><RequiredTargetFramework>3.0</RequiredTargetFramework></Reference><Reference Include="System.Xml" /><Reference Include="System.Xml.Linq"><RequiredTargetFramework>3.5</RequiredTargetFramework></Reference></ItemGroup><ItemGroup><Compile Include="ITaskManagerService.cs" /><Compile Include="Properties\AssemblyInfo.cs" /><Compile Include="TaskManagerService.cs" /></ItemGroup><ItemGroup><None Include="App.config" /></ItemGroup><ItemGroup><ProjectReference Include="..\Tasks.Entities\Tasks.Entities.csproj"><Project>{AB9ACB78-2C90-4933-9C25-92BA0353F450}</Project><Name>Tasks.Entities</Name></ProjectReference></ItemGroup><Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" /><!-- To modify your build process, add your task inside one of the targets below and uncomment it.
Other similar extension points exist, see Microsoft.Common.targets.<Target Name="BeforeBuild"></Target><Target Name="AfterBuild"></Target>
--></Project>