Fix header comment in C# std_set typemaps

Mention that these typemaps require .NET 4 or greater.

1 files changed, 7 insertions, 3 deletions

diff --git a/Lib/csharp/std_set.i b/Lib/csharp/std_set.i
index c5dd09473..3b2492e0e 100644
--- a/Lib/csharp/std_set.i
+++ b/Lib/csharp/std_set.i
@@ -1,9 +1,13 @@
 /* -----------------------------------------------------------------------------
- * std_map.i
+ * std_set.i
  *
- * SWIG typemaps for std::set<T>
+ * SWIG typemaps for std::set<T>.
  *
- * The C# wrapper is made to look and feel like a C# System.Collections.Generic.HashSet<>.
+ * Note that ISet<> used here requires .NET 4 or later.
+ *
+ * The C# wrapper implements ISet<> interface and shares performance
+ * characteristics of C# System.Collections.Generic.SortedSet<> class, but
+ * doesn't provide quite all of its methods.
  * ----------------------------------------------------------------------------- */
 
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