From df44ae4413109a7c3ce9f27fb7ae02f0414c29d9 Mon Sep 17 00:00:00 2001
From: Jon Skeet <jonskeet@google.com>
Date: Thu, 25 Jun 2015 12:08:18 +0100
Subject: More map tests, and various production code improvements. Generated
 code in next commit.

---
 src/google/protobuf/compiler/csharp/csharp_message.cc | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'src')

diff --git a/src/google/protobuf/compiler/csharp/csharp_message.cc b/src/google/protobuf/compiler/csharp/csharp_message.cc
index 3cb91951..9e055f64 100644
--- a/src/google/protobuf/compiler/csharp/csharp_message.cc
+++ b/src/google/protobuf/compiler/csharp/csharp_message.cc
@@ -405,9 +405,10 @@ void MessageGenerator::GenerateFrameworkMethods(io::Printer* printer) {
         "}\n\n");
 
     // GetHashCode
+    // Start with a non-zero value to easily distinguish between null and "empty" messages.
     printer->Print(
         "public override int GetHashCode() {\n"
-        "  int hash = 0;\n");
+        "  int hash = 17;\n");
     printer->Indent();
     for (int i = 0; i < descriptor_->field_count(); i++) {
         scoped_ptr<FieldGeneratorBase> generator(
-- 
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