From ffe7cd71f86e50b63589fbec61aa9876211a691e Mon Sep 17 00:00:00 2001
From: "Frank A. Krueger" <fak@praeclarum.org>
Date: Sat, 9 Jul 2016 14:18:22 -0700
Subject: [PATCH] Replace bigint.Negate because it doesn't exist in Xamarin

---
 src/FSharp/BigIntegerExtensions.fs | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/src/FSharp/BigIntegerExtensions.fs b/src/FSharp/BigIntegerExtensions.fs
index 9696a61e..e3aff48d 100644
--- a/src/FSharp/BigIntegerExtensions.fs
+++ b/src/FSharp/BigIntegerExtensions.fs
@@ -27,8 +27,7 @@ module BigIntegerExtensions =
                 raise <| FormatException ("The value could not be parsed.")
 
             if str.[0] = '-' then
-                parseImpl str len 0I 1
-                |> bigint.Negate
+                -(parseImpl str len 0I 1)
             else
                 parseImpl str len 0I 0