#696 Add netstandard2 project to sln
#696 Add netstandard2 project to sln

MarimerLLC/csla,rockfordlhotka/csla,JasonBock/csla,ronnymgm/csla-light,ronnymgm/csla-light,JasonBock/csla,MarimerLLC/csla,ronnymgm/csla-light,rockfordlhotka/csla,JasonBock/csla,rockfordlhotka/csla,jonnybee/csla,MarimerLLC/csla,jonnybee/csla,jonnybee/csla