add proper check.sh for csharp

syntax is
	./check.sh minimal_test.cs
or just
./check.sh

examples/undocumented/csharp_modular/check.sh

@@ -0,0 +1,34 @@
+#!/bin/bash
+if [ -z "${MONO}" ]
+then
+	MONOC=gmcs
+	MONO=mono
+fi
+
+args=$#
+if [ $args -gt 1 ]; then
+echo "Usage: ./check.sh   check all examples.
+        ./check.sh name.cs  check one example."
+exit 0
+fi
+
+export LD_LIBRARY_PATH=../../../src/shogun:../../../src/interfaces/csharp_modular
+
+if [ $args -eq 0 ]; then
+  #${MONOC} Load.cs
+  ${MONOC} $(ls *.cs | sed 's/Load.cs//')
+
+  for filename in $(ls *.cs | sed 's/Load.cs//')
+  do
+	  ${MONOC} $filename ../../../src/interfaces/csharp_modular/*.cs
+   echo "running ${filename%.cs}.exe .."
+   ${MONO} ${filename%.class}.exe >/dev/null
+  done
+fi
+
+if [ $args -eq 1 ]; then
+  arg=("$@")
+  #${MONOC} Load.cs
+  ${MONOC} ${arg[0]} ../../../src/interfaces/csharp_modular/*.cs
+  ${MONO} ${arg[0]%.cs}.exe >/dev/null
+fi