Update samples for easy execution #1523
Description
I've seen that the examples in Documentation\Examples need code changes before they can be executed. Mainly this is caused by the roslyn-analyzers that changed with editing our EditorConfig file. Here is an example:
PS D:\Repos\coverlet\Documentation\Examples\VSTest\HelloWorld> dotnet test --collect:"XPlat Code Coverage" --settings runsettings.xml Determining projects to restore... Restored D:\Repos\coverlet\Documentation\Examples\VSTest\HelloWorld\XUnitTestProject1\XUnitTestProject1.csproj (in 34 8 ms). 1 of 2 projects are up-to-date for restore. D:\Repos\coverlet\Documentation\Examples\VSTest\HelloWorld\ClassLibrary1\Class1.cs(1,1): error IDE0073: A source file i s missing a required header. [D:\Repos\coverlet\Documentation\Examples\VSTest\HelloWorld\ClassLibrary1\ClassLibrary1.cs proj] D:\Repos\coverlet\Documentation\Examples\VSTest\HelloWorld\ClassLibrary1\Class1.cs(1,1): error IDE0005: Using directive is unnecessary. [D:\Repos\coverlet\Documentation\Examples\VSTest\HelloWorld\ClassLibrary1\ClassLibrary1.csproj]