Ensure that each group of configuration properties (i.e. each group that defines the assembly configuration) is targeted at the 2013 compiler in the PlatformToolset element:
<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
<PlatformToolset>v120</PlatformToolset>
...
</PropertyGroup>
, - Condition Label. .vcxproj - , / , , . .
-, , v120.
, . , ImportGroup vcxproj , , , Property Manager Visual Studio - | node, , .
, CLR, v4.5.1:
<Project>
<PropertyGroup Label="Globals">
<TargetFrameworkVersion>v4.5.1</TargetFrameworkVersion>
...
</PropertyGroup>
</Project>