diff --git a/SWIG/Lib/csharp/std_string.i b/SWIG/Lib/csharp/std_string.i
new file mode 100644
index 000000000..310c01788
--- /dev/null
+++ b/SWIG/Lib/csharp/std_string.i
@@ -0,0 +1,60 @@
+//
+// SWIG typemaps for std::string
+// William Fulton
+//
+// C# implementation
+//
+/* ------------------------------------------------------------------------
+  Typemaps for std::string and const std::string&
+  These are mapped to a C# String and are passed around by value.
+
+  To use non-const std::string references use the following %apply.  Note 
+  that they are passed by value.
+  %apply const std::string & {std::string &};
+  ------------------------------------------------------------------------ */
+
+%{
+#include <string>
+%}
+
+namespace std {
+
+class string;
+
+// string
+%typemap(ctype) string "char *"
+%typemap(imtype) string "string"
+%typemap(cstype) string "string"
+
+%typemap(in) string 
+%{ if (!$input) SWIG_CSharpThrowException(SWIG_CSharpNullReferenceException, "null string");
+  $1 = std::string($input); %}
+%typemap(out) string %{ $result = SWIG_csharp_string_callback($1.c_str()); %}
+
+%typemap(csin) string "$csinput"
+%typemap(csout) string {
+    return $imcall;
+  }
+
+%typemap(typecheck) string = char *;
+
+// const string &
+%typemap(ctype) const string & "char *"
+%typemap(imtype) const string & "string"
+%typemap(cstype) const string & "string"
+
+%typemap(in) const string &
+%{ if (!$input) SWIG_CSharpThrowException(SWIG_CSharpNullReferenceException, "null string");
+  $1 = new std::string($input); %}
+%typemap(out) const string & %{ $result = SWIG_csharp_string_callback($1->c_str()); %}
+%typemap(freearg) const string & %{ delete $1; %}
+
+%typemap(csin) const string & "$csinput"
+%typemap(csout) const string & {
+    return $imcall;
+  }
+
+%typemap(typecheck) const string & = char *;
+
+}
+