Migrate solution to .slnx, update type checks and rename file

bug fix

improve tests

improve tests

fix failing test

Update EntityComparer.cs

Merge pull request #97 from loresoft/dependabot/nuget/xunit.runner.vi…

…sualstudio-2.8.0

Bump xunit.runner.visualstudio from 2.5.8 to 2.8.0

Update Directory.Build.props

update packages

update build