THRIFT-4723 Consolidate C#/netcore into new netstd language target
Client: netstd
Patch: Jens Geyer

This closes #1710
diff --git a/tutorial/tutorial.thrift b/tutorial/tutorial.thrift
index e027546..ea18b73 100644
--- a/tutorial/tutorial.thrift
+++ b/tutorial/tutorial.thrift
@@ -72,6 +72,7 @@
 namespace perl tutorial
 namespace haxe tutorial
 namespace netcore tutorial
+namespace netstd tutorial
 
 /**
  * Thrift lets you do typedefs to get pretty names for your types. Standard