build sln,report the issues:

Severity Code Description Project File Line Suppression State
Error (active) E0312 no suitable user-defined conversion from "int" to "Platform::ValueType" exists CalcViewModel E:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.22.27905\include\vccorlib.h 1723

Severity Code Description Project File Line Suppression State
Warning NU1701 已使用“.NETFramework,Version=v4.6.1”而不是项目目标框架“.NETStandard,Version=v2.0”还原包“MSTest.TestAdapter 1.4.0”。此包可能与项目不完全兼容。 CalculatorUITestFramework C:\Users\lyl\AppData\Roaming\Code - Insiders\User\cpptest\calculator\src\CalculatorUITestFramework\CalculatorUITestFramework.csproj 1

Severity Code Description Project File Line Suppression State
Error Certificate does not match supplied signing thumbprint: 3F0C32266A4D995CC08C9AEC3960CFF3EF0D1853 CalculatorUnitTests E:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\MSBuild\Microsoft\VisualStudio\v16.0\AppxPackage\Microsoft.AppXPackage.Targets 821

Severity Code Description Project File Line Suppression State
Error Certificate could not be opened: TemporaryKey.pfx.
The specified network password is not correct.
Calculator E:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\MSBuild\Microsoft\VisualStudio\v16.0\AppxPackage\Microsoft.AppXPackage.Targets 821

• OS Build: 10.0.18950.0

• Architecture: X64

• Application Version: 10.1906.53.0

• Region: en-US

• Dev Version Installed: False

see:
https://gyazo.com/93cabe0905a0fc050abaf0f8bafb026c