Initial data commit

Task/String-length/Visual-Basic-.NET/string-length-3.vb

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+Module GraphemeLength
+    ' Wraps an IEnumerator, allowing it to be used as an IEnumerable.
+    Private Iterator Function AsEnumerable(enumerator As IEnumerator) As IEnumerable
+        Do While enumerator.MoveNext()
+            Yield enumerator.Current
+        Loop
+    End Function
+
+    Function GraphemeCount(s As String) As Integer
+        Dim elements = Globalization.StringInfo.GetTextElementEnumerator(s)
+        Return AsEnumerable(elements).OfType(Of String).Count()
+    End Function
+End Module