Updated Memory target (markdown)
Removed OptimizeBufferReuse since obsolete with NLog 5.0
Removed example with SimpleConfigurator
Added OptimizeBufferReuse
Revert b6e573996cad5896eadf0bb956f16db7dec9d3de...15118b639f6e246ea06f2ae78f94f57454a39e1a on Memory target
Added example
xml syntax highlighting
Created Memory target (markdown)