Ответ 1
package.config должен предоставить вам информацию о версии
Пример
<package id="xunit" version="2.2.0-beta1-build3239" targetFramework="net46" />
<package id="xunit.abstractions" version="2.0.0" targetFramework="net46" />
<package id="xunit.assert" version="2.2.0-beta1-build3239" targetFramework="net46" />
<package id="xunit.core" version="2.2.0-beta1-build3239" targetFramework="net46" />
<package id="xunit.extensibility.core" version="2.2.0-beta1-build3239" targetFramework="net46" />
<package id="xunit.extensibility.execution" version="2.2.0-beta1-build3239" targetFramework="net46" />
<package id="xunit.runner.msbuild" version="2.2.0-beta1-build3239" targetFramework="net46" developmentDependency="true" />
<package id="xunit.runner.visualstudio" version="2.2.0-beta1-build1144" targetFramework="net46" developmentDependency="true" />