Visual Studio中的“配置管理器”对话框有什么问题？

Question

请参阅下面我在VS2017中的起点。我有4个具有相同C ++代码的项目。项目4是当前选择的启动代码。我还将显示“配置管理器”对话框，为解决方案中的所有项目显示相同的配置/平台Release/Win32。

现在，如果我将对话框中的“活动”解决方案配置更改为Debug，这是我从每个项目中获得的：

在新的Configuration Manager对话框中，平台x64的来源是什么？

解决方案文件：

Microsoft Visual Studio Solution File, Format Version 12.00
# Visual Studio 15
VisualStudioVersion = 15.0.28307.902
MinimumVisualStudioVersion = 10.0.40219.1
Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "0", "0\0.vcxproj", "{C5F36068-3D2B-4660-B5ED-2F194A07F075}"
EndProject
Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "1", "1\1.vcxproj", "{28C914BE-5BA4-4C32-9B9E-B88AA414F346}"
EndProject
Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "2", "2\2.vcxproj", "{E40FB7E6-2D06-423C-87CD-117075438D24}"
EndProject
Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "3", "3\3.vcxproj", "{2BB98E5B-1D14-4544-BB03-B180FEBC488A}"
EndProject
Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "4", "4\4.vcxproj", "{888A27C8-8FD7-4401-B034-C6FFAA00141E}"
EndProject
Global
    GlobalSection(SolutionConfigurationPlatforms) = preSolution
        Debug|x64 = Debug|x64
        Debug|x86 = Debug|x86
        Release|x64 = Release|x64
        Release|x86 = Release|x86
    EndGlobalSection
    GlobalSection(ProjectConfigurationPlatforms) = postSolution
        {C5F36068-3D2B-4660-B5ED-2F194A07F075}.Debug|x64.ActiveCfg = Debug|Win32
        {C5F36068-3D2B-4660-B5ED-2F194A07F075}.Debug|x64.Build.0 = Debug|Win32
        {C5F36068-3D2B-4660-B5ED-2F194A07F075}.Debug|x86.ActiveCfg = Debug|x64
        {C5F36068-3D2B-4660-B5ED-2F194A07F075}.Debug|x86.Build.0 = Debug|x64
        {C5F36068-3D2B-4660-B5ED-2F194A07F075}.Release|x64.ActiveCfg = Release|x64
        {C5F36068-3D2B-4660-B5ED-2F194A07F075}.Release|x64.Build.0 = Release|x64
        {C5F36068-3D2B-4660-B5ED-2F194A07F075}.Release|x86.ActiveCfg = Release|Win32
        {C5F36068-3D2B-4660-B5ED-2F194A07F075}.Release|x86.Build.0 = Release|Win32
        {28C914BE-5BA4-4C32-9B9E-B88AA414F346}.Debug|x64.ActiveCfg = Debug|Win32
        {28C914BE-5BA4-4C32-9B9E-B88AA414F346}.Debug|x64.Build.0 = Debug|Win32
        {28C914BE-5BA4-4C32-9B9E-B88AA414F346}.Debug|x86.ActiveCfg = Debug|Win32
        {28C914BE-5BA4-4C32-9B9E-B88AA414F346}.Debug|x86.Build.0 = Debug|Win32
        {28C914BE-5BA4-4C32-9B9E-B88AA414F346}.Release|x64.ActiveCfg = Release|Win32
        {28C914BE-5BA4-4C32-9B9E-B88AA414F346}.Release|x64.Build.0 = Release|Win32
        {28C914BE-5BA4-4C32-9B9E-B88AA414F346}.Release|x86.ActiveCfg = Release|Win32
        {28C914BE-5BA4-4C32-9B9E-B88AA414F346}.Release|x86.Build.0 = Release|Win32
        {E40FB7E6-2D06-423C-87CD-117075438D24}.Debug|x64.ActiveCfg = Debug|x64
        {E40FB7E6-2D06-423C-87CD-117075438D24}.Debug|x64.Build.0 = Debug|x64
        {E40FB7E6-2D06-423C-87CD-117075438D24}.Debug|x86.ActiveCfg = Debug|x64
        {E40FB7E6-2D06-423C-87CD-117075438D24}.Debug|x86.Build.0 = Debug|x64
        {E40FB7E6-2D06-423C-87CD-117075438D24}.Release|x64.ActiveCfg = Release|x64
        {E40FB7E6-2D06-423C-87CD-117075438D24}.Release|x64.Build.0 = Release|x64
        {E40FB7E6-2D06-423C-87CD-117075438D24}.Release|x86.ActiveCfg = Release|Win32
        {E40FB7E6-2D06-423C-87CD-117075438D24}.Release|x86.Build.0 = Release|Win32
        {2BB98E5B-1D14-4544-BB03-B180FEBC488A}.Debug|x64.ActiveCfg = Debug|x64
        {2BB98E5B-1D14-4544-BB03-B180FEBC488A}.Debug|x64.Build.0 = Debug|x64
        {2BB98E5B-1D14-4544-BB03-B180FEBC488A}.Debug|x86.ActiveCfg = Debug|x64
        {2BB98E5B-1D14-4544-BB03-B180FEBC488A}.Debug|x86.Build.0 = Debug|x64
        {2BB98E5B-1D14-4544-BB03-B180FEBC488A}.Release|x64.ActiveCfg = Release|x64
        {2BB98E5B-1D14-4544-BB03-B180FEBC488A}.Release|x64.Build.0 = Release|x64
        {2BB98E5B-1D14-4544-BB03-B180FEBC488A}.Release|x86.ActiveCfg = Release|Win32
        {2BB98E5B-1D14-4544-BB03-B180FEBC488A}.Release|x86.Build.0 = Release|Win32
        {888A27C8-8FD7-4401-B034-C6FFAA00141E}.Debug|x64.ActiveCfg = Debug|x64
        {888A27C8-8FD7-4401-B034-C6FFAA00141E}.Debug|x64.Build.0 = Debug|x64
        {888A27C8-8FD7-4401-B034-C6FFAA00141E}.Debug|x86.ActiveCfg = Debug|x64
        {888A27C8-8FD7-4401-B034-C6FFAA00141E}.Debug|x86.Build.0 = Debug|x64
        {888A27C8-8FD7-4401-B034-C6FFAA00141E}.Release|x64.ActiveCfg = Release|x64
        {888A27C8-8FD7-4401-B034-C6FFAA00141E}.Release|x64.Build.0 = Release|x64
        {888A27C8-8FD7-4401-B034-C6FFAA00141E}.Release|x86.ActiveCfg = Release|Win32
        {888A27C8-8FD7-4401-B034-C6FFAA00141E}.Release|x86.Build.0 = Release|Win32
    EndGlobalSection
    GlobalSection(SolutionProperties) = preSolution
        HideSolutionNode = FALSE
    EndGlobalSection
    GlobalSection(ExtensibilityGlobals) = postSolution
        SolutionGuid = {F798085A-D102-4837-A5C7-CFC4CE56C4BC}
    EndGlobalSection
EndGlobal