diff --git a/ruby-sockets/marco-polo/cs/MarcoPoloClient/Makefile b/ruby-sockets/marco-polo/cs/MarcoPoloClient/Makefile
new file mode 100644
index 0000000..5daac93
--- /dev/null
+++ b/ruby-sockets/marco-polo/cs/MarcoPoloClient/Makefile
@@ -0,0 +1,2 @@
+MarcoPoloClient/bin/Debug/MarcoPoloClient.exe: $(wildcard MarcoPoloClient/*.cs)
+	mdtool build --f --buildfile:MarcoPoloClient.sln