merged with latest master

Author: david-driscoll

src/Directory.Build.props

@@ -1,9 +1,10 @@
 <Project>
   <PropertyGroup>
-	<AssetTargetFallback Condition=" '$(TargetFramework)' == 'netstandard1.6' ">$(AssetTargetFallback);dotnet5.4;portable-net45+win8</AssetTargetFallback>
-	<PackageVersion Condition="'$(GitVersion_NuGetVersion)' != ''">$(GitVersion_NuGetVersion)</PackageVersion>
-	<AssemblyVersion Condition="'$(GitVersion_AssemblySemVer)' != ''">$(GitVersion_AssemblySemVer)</AssemblyVersion>
-	<FileVersion Condition="'$(GitVersion_AssemblySemVer)' != ''">$(GitVersion_AssemblySemVer)</FileVersion>
-	<InformationalVersion Condition="'$(GitVersion_InformationalVersion)' != ''">$(GitVersion_InformationalVersion)</InformationalVersion>
+    <AssetTargetFallback Condition=" '$(TargetFramework)' == 'netstandard1.6' ">$(AssetTargetFallback);dotnet5.4;portable-net45+win8</AssetTargetFallback>
+    <PackageVersion Condition="'$(GitVersion_NuGetVersion)' != ''">$(GitVersion_NuGetVersion)</PackageVersion>
+    <AssemblyVersion Condition="'$(GitVersion_AssemblySemVer)' != ''">$(GitVersion_AssemblySemVer)</AssemblyVersion>
+    <FileVersion Condition="'$(GitVersion_AssemblySemVer)' != ''">$(GitVersion_AssemblySemVer)</FileVersion>
+    <InformationalVersion Condition="'$(GitVersion_InformationalVersion)' != ''">$(GitVersion_InformationalVersion)</InformationalVersion>
+    <LangVersion>Latest</LangVersion>
   </PropertyGroup>
-</Project>
+</Project>

src/Lsp/LanguageServer.cs

@@ -1,4 +1,5 @@
-using System;
+using System;
+using System.Collections.Concurrent;
 using System.Collections.Generic;
 using System.IO;
 using System.Linq;
@@ -214,6 +215,9 @@ private async Task DynamicallyRegisterHandlers()
                 registrations.Add(handler.Registration);
             }
 
+            if (registrations.Count == 0)
+                return; // No dynamic registrations supported by client.
+
             var @params = new RegistrationParams() { Registrations = registrations };
 
             await this.RegisterCapability(@params);
@@ -261,4 +265,4 @@ public void Dispose()
 
         public IDictionary<string, JToken> Experimental { get; } = new Dictionary<string, JToken>();
     }
-}
+}

test/Directory.Build.props

@@ -0,0 +1,6 @@
+<Project>
+  <PropertyGroup>
+    <AssetTargetFallback Condition=" '$(TargetFramework)' == 'netstandard1.6' ">$(AssetTargetFallback);dotnet5.4;portable-net45+win8</AssetTargetFallback>
+    <LangVersion>Latest</LangVersion>
+  </PropertyGroup>
+</Project>

test/JsonRpc.Tests/JsonRpc.Tests.csproj

@@ -4,7 +4,6 @@
         <WarningsAsErrors>true</WarningsAsErrors>
         <PlatformTarget>AnyCPU</PlatformTarget>
         <GenerateRuntimeConfigurationFiles>true</GenerateRuntimeConfigurationFiles>
-        <AssetTargetFallback>$(AssetTargetFallback);dotnet5.4;portable-net45+win8</AssetTargetFallback>
     </PropertyGroup>
     <ItemGroup>
         <ProjectReference Include="..\..\src\JsonRpc\JsonRpc.csproj" />

test/Lsp.Tests/Lsp.Tests.csproj

@@ -4,7 +4,6 @@
         <WarningsAsErrors>true</WarningsAsErrors>
         <PlatformTarget>AnyCPU</PlatformTarget>
         <GenerateRuntimeConfigurationFiles>true</GenerateRuntimeConfigurationFiles>
-        <AssetTargetFallback>$(AssetTargetFallback);dotnet5.4;portable-net45+win8</AssetTargetFallback>
     </PropertyGroup>
     <ItemGroup>
         <None Remove="**\*.json" />