From 1c5ea4077dca027515b955c55cefc85de255db50 Mon Sep 17 00:00:00 2001
From: Boris <boris.dogadov@mongodb.com>
Date: Fri, 15 Jan 2021 15:13:31 -0800
Subject: [PATCH] CSHARP-2750: Upgrade to C# 9

---
 MongoDB.ruleset                                               | 2 +-
 src/MongoDB.Bson/MongoDB.Bson.csproj                          | 4 ++--
 src/MongoDB.Driver.Core/MongoDB.Driver.Core.csproj            | 2 +-
 src/MongoDB.Driver.GridFS/MongoDB.Driver.GridFS.csproj        | 4 ++--
 src/MongoDB.Driver/MongoDB.Driver.csproj                      | 4 ++--
 .../AstrolabeWorkloadExecutor.csproj                          | 2 +-
 tests/AtlasConnectivity.Tests/AtlasConnectivity.Tests.csproj  | 4 ++--
 .../MongoDB.Bson.TestHelpers/MongoDB.Bson.TestHelpers.csproj  | 4 ++--
 tests/MongoDB.Bson.Tests/MongoDB.Bson.Tests.csproj            | 4 ++--
 .../MongoDB.Driver.Core.TestHelpers.csproj                    | 4 ++--
 .../MongoDB.Driver.Core.Tests.csproj                          | 4 ++--
 tests/MongoDB.Driver.Examples/MongoDB.Driver.Examples.csproj  | 4 ++--
 .../MongoDB.Driver.TestConsoleApplication.csproj              | 3 ++-
 .../MongoDB.Driver.TestHelpers.csproj                         | 4 ++--
 tests/MongoDB.Driver.Tests/MongoDB.Driver.Tests.csproj        | 4 ++--
 tests/SkippableTests/SkippableTests.csproj                    | 4 ++--
 16 files changed, 29 insertions(+), 28 deletions(-)

diff --git a/MongoDB.ruleset b/MongoDB.ruleset
index 48a63d467be..9c4dd9562c1 100644
--- a/MongoDB.ruleset
+++ b/MongoDB.ruleset
@@ -21,7 +21,7 @@
     <Rule Id="CA1060" Action="Warning" />
     <Rule Id="CA1061" Action="None" />
     <Rule Id="CA1063" Action="None" />
-    <Rule Id="CA1065" Action="Warning" />
+    <Rule Id="CA1065" Action="Info" />
     <Rule Id="CA1067" Action="None" />
     <Rule Id="CA1200" Action="None" />
     <Rule Id="CA1301" Action="Warning" />
diff --git a/src/MongoDB.Bson/MongoDB.Bson.csproj b/src/MongoDB.Bson/MongoDB.Bson.csproj
index 10383ba3a3a..39f7178719e 100644
--- a/src/MongoDB.Bson/MongoDB.Bson.csproj
+++ b/src/MongoDB.Bson/MongoDB.Bson.csproj
@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <IsWindows Condition="$([MSBuild]::IsOSPlatform('Windows'))">true</IsWindows>
   </PropertyGroup>
@@ -6,7 +6,7 @@
   <PropertyGroup>
     <TargetFrameworks>netstandard1.5;netstandard2.0;netstandard2.1;net452</TargetFrameworks>
     <TargetFrameworks Condition="'$(IsWindows)'!='true'">netstandard1.5;netstandard2.0;netstandard2.1</TargetFrameworks>
-    <LangVersion>7.3</LangVersion>
+    <LangVersion>9</LangVersion>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
     <WarningsAsErrors />
     <CodeAnalysisRuleSet>..\..\MongoDBLegacy.ruleset</CodeAnalysisRuleSet>
diff --git a/src/MongoDB.Driver.Core/MongoDB.Driver.Core.csproj b/src/MongoDB.Driver.Core/MongoDB.Driver.Core.csproj
index 804b7384118..49a99292987 100644
--- a/src/MongoDB.Driver.Core/MongoDB.Driver.Core.csproj
+++ b/src/MongoDB.Driver.Core/MongoDB.Driver.Core.csproj
@@ -8,7 +8,7 @@
   <PropertyGroup>
     <TargetFrameworks>netstandard1.5;netstandard2.0;netstandard2.1;net452</TargetFrameworks>
     <TargetFrameworks Condition="'$(IsWindows)'!='true'">netstandard1.5;netstandard2.0;netstandard2.1</TargetFrameworks>
-    <LangVersion>7.3</LangVersion>
+    <LangVersion>9</LangVersion>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
     <WarningsAsErrors />
     <CodeAnalysisRuleSet>..\..\MongoDB.ruleset</CodeAnalysisRuleSet>
diff --git a/src/MongoDB.Driver.GridFS/MongoDB.Driver.GridFS.csproj b/src/MongoDB.Driver.GridFS/MongoDB.Driver.GridFS.csproj
index aade3175976..f8b606eac45 100644
--- a/src/MongoDB.Driver.GridFS/MongoDB.Driver.GridFS.csproj
+++ b/src/MongoDB.Driver.GridFS/MongoDB.Driver.GridFS.csproj
@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <IsWindows Condition="$([MSBuild]::IsOSPlatform('Windows'))">true</IsWindows>
   </PropertyGroup>
@@ -6,7 +6,7 @@
   <PropertyGroup>
     <TargetFrameworks>netstandard1.5;netstandard2.0;netstandard2.1;net452</TargetFrameworks>
     <TargetFrameworks Condition="'$(IsWindows)'!='true'">netstandard1.5;netstandard2.0;netstandard2.1</TargetFrameworks>
-    <LangVersion>7.3</LangVersion>
+    <LangVersion>9</LangVersion>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
     <WarningsAsErrors />
     <CodeAnalysisRuleSet>..\..\MongoDB.ruleset</CodeAnalysisRuleSet>
diff --git a/src/MongoDB.Driver/MongoDB.Driver.csproj b/src/MongoDB.Driver/MongoDB.Driver.csproj
index 824277a2daa..2964f65e09f 100644
--- a/src/MongoDB.Driver/MongoDB.Driver.csproj
+++ b/src/MongoDB.Driver/MongoDB.Driver.csproj
@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <IsWindows Condition="$([MSBuild]::IsOSPlatform('Windows'))">true</IsWindows>
   </PropertyGroup>
@@ -6,7 +6,7 @@
   <PropertyGroup>
     <TargetFrameworks>netstandard1.5;netstandard2.0;netstandard2.1;net452</TargetFrameworks>
     <TargetFrameworks Condition="'$(IsWindows)'!='true'">netstandard1.5;netstandard2.0;netstandard2.1</TargetFrameworks>
-    <LangVersion>7.3</LangVersion>
+    <LangVersion>9</LangVersion>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
     <WarningsAsErrors />
     <CodeAnalysisRuleSet>..\..\MongoDB.ruleset</CodeAnalysisRuleSet>
diff --git a/tests/AstrolabeWorkloadExecutor/AstrolabeWorkloadExecutor.csproj b/tests/AstrolabeWorkloadExecutor/AstrolabeWorkloadExecutor.csproj
index 12f130c2a79..7bda0d7a4b3 100644
--- a/tests/AstrolabeWorkloadExecutor/AstrolabeWorkloadExecutor.csproj
+++ b/tests/AstrolabeWorkloadExecutor/AstrolabeWorkloadExecutor.csproj
@@ -7,7 +7,7 @@
     <OutputType>Exe</OutputType>
     <TargetFrameworks>netcoreapp1.1;netcoreapp2.1;netcoreapp3.0;net452</TargetFrameworks>
     <TargetFrameworks Condition="'$(IsWindows)'!='true'">netcoreapp1.1;netcoreapp2.1;netcoreapp3.0</TargetFrameworks>
-    <LangVersion>7.3</LangVersion>
+    <LangVersion>9</LangVersion>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
     <WarningsAsErrors />
     <IsPackable>false</IsPackable>
diff --git a/tests/AtlasConnectivity.Tests/AtlasConnectivity.Tests.csproj b/tests/AtlasConnectivity.Tests/AtlasConnectivity.Tests.csproj
index 1a1cc8da8c3..b6490fa2899 100644
--- a/tests/AtlasConnectivity.Tests/AtlasConnectivity.Tests.csproj
+++ b/tests/AtlasConnectivity.Tests/AtlasConnectivity.Tests.csproj
@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <IsWindows Condition="$([MSBuild]::IsOSPlatform('Windows'))">true</IsWindows>
   </PropertyGroup>
@@ -6,7 +6,7 @@
   <PropertyGroup>
     <TargetFrameworks>netcoreapp2.1;netcoreapp3.0;net452</TargetFrameworks>
     <TargetFrameworks Condition="'$(IsWindows)'!='true'">netcoreapp2.1;netcoreapp3.0</TargetFrameworks>
-    <LangVersion>7.3</LangVersion>
+    <LangVersion>9</LangVersion>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
     <WarningsAsErrors />
     <IsPackable>false</IsPackable>
diff --git a/tests/MongoDB.Bson.TestHelpers/MongoDB.Bson.TestHelpers.csproj b/tests/MongoDB.Bson.TestHelpers/MongoDB.Bson.TestHelpers.csproj
index e4cd1320ab8..b0bf1a655c9 100644
--- a/tests/MongoDB.Bson.TestHelpers/MongoDB.Bson.TestHelpers.csproj
+++ b/tests/MongoDB.Bson.TestHelpers/MongoDB.Bson.TestHelpers.csproj
@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <IsWindows Condition="$([MSBuild]::IsOSPlatform('Windows'))">true</IsWindows>
   </PropertyGroup>
@@ -6,7 +6,7 @@
   <PropertyGroup>
     <TargetFrameworks>netstandard1.5;netstandard2.0;netstandard2.1;net452</TargetFrameworks>
     <TargetFrameworks Condition="'$(IsWindows)'!='true'">netstandard1.5;netstandard2.0;netstandard2.1</TargetFrameworks>
-    <LangVersion>7.3</LangVersion>
+    <LangVersion>9</LangVersion>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
     <WarningsAsErrors />
     <IsPackable>false</IsPackable>
diff --git a/tests/MongoDB.Bson.Tests/MongoDB.Bson.Tests.csproj b/tests/MongoDB.Bson.Tests/MongoDB.Bson.Tests.csproj
index f2dd71f9d91..32a09426a1d 100644
--- a/tests/MongoDB.Bson.Tests/MongoDB.Bson.Tests.csproj
+++ b/tests/MongoDB.Bson.Tests/MongoDB.Bson.Tests.csproj
@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <IsWindows Condition="$([MSBuild]::IsOSPlatform('Windows'))">true</IsWindows>
   </PropertyGroup>
@@ -6,7 +6,7 @@
   <PropertyGroup>
     <TargetFrameworks>netcoreapp1.1;netcoreapp2.1;netcoreapp3.0;net452</TargetFrameworks>
     <TargetFrameworks Condition="'$(IsWindows)'!='true'">netcoreapp1.1;netcoreapp2.1;netcoreapp3.0</TargetFrameworks>
-    <LangVersion>7.3</LangVersion>
+    <LangVersion>9</LangVersion>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
     <WarningsAsErrors />
     <IsPackable>false</IsPackable>
diff --git a/tests/MongoDB.Driver.Core.TestHelpers/MongoDB.Driver.Core.TestHelpers.csproj b/tests/MongoDB.Driver.Core.TestHelpers/MongoDB.Driver.Core.TestHelpers.csproj
index fb1a4fbce6d..9f197ff5c70 100644
--- a/tests/MongoDB.Driver.Core.TestHelpers/MongoDB.Driver.Core.TestHelpers.csproj
+++ b/tests/MongoDB.Driver.Core.TestHelpers/MongoDB.Driver.Core.TestHelpers.csproj
@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <IsWindows Condition="$([MSBuild]::IsOSPlatform('Windows'))">true</IsWindows>
   </PropertyGroup>
@@ -12,7 +12,7 @@
   <PropertyGroup>
     <TargetFrameworks>netstandard1.5;netstandard2.0;netstandard2.1;net452</TargetFrameworks>
     <TargetFrameworks Condition="'$(IsWindows)'!='true'">netstandard1.5;netstandard2.0;netstandard2.1</TargetFrameworks>
-    <LangVersion>7.3</LangVersion>
+    <LangVersion>9</LangVersion>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
     <WarningsAsErrors />
     <IsPackable>false</IsPackable>
diff --git a/tests/MongoDB.Driver.Core.Tests/MongoDB.Driver.Core.Tests.csproj b/tests/MongoDB.Driver.Core.Tests/MongoDB.Driver.Core.Tests.csproj
index 16e08d6bc0d..0db815ce661 100644
--- a/tests/MongoDB.Driver.Core.Tests/MongoDB.Driver.Core.Tests.csproj
+++ b/tests/MongoDB.Driver.Core.Tests/MongoDB.Driver.Core.Tests.csproj
@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <IsWindows Condition="$([MSBuild]::IsOSPlatform('Windows'))">true</IsWindows>
   </PropertyGroup>
@@ -6,7 +6,7 @@
   <PropertyGroup>
     <TargetFrameworks>netcoreapp1.1;netcoreapp2.1;netcoreapp3.0;net452</TargetFrameworks>
     <TargetFrameworks Condition="'$(IsWindows)'!='true'">netcoreapp1.1;netcoreapp2.1;netcoreapp3.0</TargetFrameworks>
-    <LangVersion>7.3</LangVersion>
+    <LangVersion>9</LangVersion>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
     <WarningsAsErrors />
     <IsPackable>false</IsPackable>
diff --git a/tests/MongoDB.Driver.Examples/MongoDB.Driver.Examples.csproj b/tests/MongoDB.Driver.Examples/MongoDB.Driver.Examples.csproj
index f9381eaaf7f..0a915a29329 100644
--- a/tests/MongoDB.Driver.Examples/MongoDB.Driver.Examples.csproj
+++ b/tests/MongoDB.Driver.Examples/MongoDB.Driver.Examples.csproj
@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <IsWindows Condition="$([MSBuild]::IsOSPlatform('Windows'))">true</IsWindows>
   </PropertyGroup>
@@ -6,7 +6,7 @@
   <PropertyGroup>
     <TargetFrameworks>netcoreapp1.1;netcoreapp2.1;netcoreapp3.0;net452</TargetFrameworks>
     <TargetFrameworks Condition="'$(IsWindows)'!='true'">netcoreapp1.1;netcoreapp2.1;netcoreapp3.0</TargetFrameworks>
-    <LangVersion>7.3</LangVersion>
+    <LangVersion>9</LangVersion>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
     <WarningsAsErrors />
     <IsPackable>false</IsPackable>
diff --git a/tests/MongoDB.Driver.TestConsoleApplication/MongoDB.Driver.TestConsoleApplication.csproj b/tests/MongoDB.Driver.TestConsoleApplication/MongoDB.Driver.TestConsoleApplication.csproj
index 16c01c1a074..b86a5ae976f 100644
--- a/tests/MongoDB.Driver.TestConsoleApplication/MongoDB.Driver.TestConsoleApplication.csproj
+++ b/tests/MongoDB.Driver.TestConsoleApplication/MongoDB.Driver.TestConsoleApplication.csproj
@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <IsWindows Condition="$([MSBuild]::IsOSPlatform('Windows'))">true</IsWindows>
   </PropertyGroup>
@@ -7,6 +7,7 @@
     <OutputType>Exe</OutputType>
     <TargetFrameworks>netcoreapp2.1;netcoreapp3.0;net452</TargetFrameworks>
     <TargetFrameworks Condition="'$(IsWindows)'!='true'">netcoreapp2.1;netcoreapp3.0</TargetFrameworks>
+    <LangVersion>9</LangVersion>
   </PropertyGroup>
 
   <PropertyGroup>
diff --git a/tests/MongoDB.Driver.TestHelpers/MongoDB.Driver.TestHelpers.csproj b/tests/MongoDB.Driver.TestHelpers/MongoDB.Driver.TestHelpers.csproj
index d1c47f4f33d..0fc60f03683 100644
--- a/tests/MongoDB.Driver.TestHelpers/MongoDB.Driver.TestHelpers.csproj
+++ b/tests/MongoDB.Driver.TestHelpers/MongoDB.Driver.TestHelpers.csproj
@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <IsWindows Condition="$([MSBuild]::IsOSPlatform('Windows'))">true</IsWindows>
   </PropertyGroup>
@@ -6,7 +6,7 @@
   <PropertyGroup>
     <TargetFrameworks>netstandard1.5;netstandard2.0;netstandard2.1;net452</TargetFrameworks>
     <TargetFrameworks Condition="'$(IsWindows)'!='true'">netstandard1.5;netstandard2.0;netstandard2.1</TargetFrameworks>
-    <LangVersion>7.3</LangVersion>
+    <LangVersion>9</LangVersion>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
     <WarningsAsErrors />
     <IsPackable>false</IsPackable>
diff --git a/tests/MongoDB.Driver.Tests/MongoDB.Driver.Tests.csproj b/tests/MongoDB.Driver.Tests/MongoDB.Driver.Tests.csproj
index 0061f549150..cc46baf1819 100644
--- a/tests/MongoDB.Driver.Tests/MongoDB.Driver.Tests.csproj
+++ b/tests/MongoDB.Driver.Tests/MongoDB.Driver.Tests.csproj
@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <IsWindows Condition="$([MSBuild]::IsOSPlatform('Windows'))">true</IsWindows>
   </PropertyGroup>
@@ -6,7 +6,7 @@
   <PropertyGroup>
     <TargetFrameworks>netcoreapp1.1;netcoreapp2.1;netcoreapp3.0;net452</TargetFrameworks>
     <TargetFrameworks Condition="'$(IsWindows)'!='true'">netcoreapp1.1;netcoreapp2.1;netcoreapp3.0</TargetFrameworks>
-    <LangVersion>7.3</LangVersion>
+    <LangVersion>9</LangVersion>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
     <WarningsAsErrors />
     <IsPackable>false</IsPackable>
diff --git a/tests/SkippableTests/SkippableTests.csproj b/tests/SkippableTests/SkippableTests.csproj
index 90da0eac9a1..6a4af5c3199 100644
--- a/tests/SkippableTests/SkippableTests.csproj
+++ b/tests/SkippableTests/SkippableTests.csproj
@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <IsWindows Condition="$([MSBuild]::IsOSPlatform('Windows'))">true</IsWindows>
   </PropertyGroup>
@@ -6,7 +6,7 @@
   <PropertyGroup>
     <TargetFrameworks>netcoreapp2.1;net452</TargetFrameworks>
     <TargetFrameworks Condition="'$(IsWindows)'!='true'">netcoreapp2.1</TargetFrameworks>
-    <LangVersion>7.3</LangVersion>
+    <LangVersion>9</LangVersion>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
     <WarningsAsErrors />
     <IsPackable>false</IsPackable>