Add project files.

Beam.Exports/S.cs

@@ -0,0 +1,13 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Beam.Exports {
+    internal static class S {
+        internal static class M {
+            internal const string FileDirectoryDoesNotExist = "Part of the path supplied does not exist.";
+        }
+    }
+}