Update dotnet-projects.md
Update dotnet-projects.md

Added ArcGIS.PCL and ColoredConsole
Microsoft/dotnet,velyo/dotnet,richlander/dotnet,BruceForstall/dotnet,690486439/dotnet,richlander/dotnet,velyo/dotnet,Microsoft/dotnet,punker76/dotnet,BruceForstall/dotnet,punker76/dotnet