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And they haven't even done that. Visual Studio 2015 isn't open source. SQL Server isn't open source. WPF? WinForms? And, I might be off here because the naming

by ld00d 10y ago

And they haven't even done that. Visual Studio 2015 isn't open source. SQL Server isn't open source. WPF? WinForms? And, I might be off here because the naming is very confusing, but is the .Net Framework actually open source? It seems like only .Net "Core" is.