add RegisterOnDemandCollectors in ICollectorRegistry

Author: phnx47

.gitignore

@@ -7,3 +7,4 @@
 bin
 obj
 packages
+.idea

src/Prometheus.Client/Collectors/ICollectorRegistry.cs

@@ -10,5 +10,7 @@ public interface ICollectorRegistry
         bool Remove(ICollector collector);
 
         IEnumerable<MetricFamily> CollectAll();
+
+        void RegisterOnDemandCollectors(IEnumerable<IOnDemandCollector> onDemandCollectors);
     }
 }

src/Prometheus.Client/Collectors/PerfCounterCollector.cs

@@ -1,4 +1,4 @@
-#if !COREFX
+#if !NETSTANDART13
 
 using System;
 using System.Collections.Generic;

src/Prometheus.Client/Prometheus.Client.csproj

@@ -4,7 +4,7 @@
     <Description>.NET client for prometheus.io.</Description>
     <Copyright>2017 © Sergey Kuznetsov</Copyright>
     <AssemblyTitle>Prometheus.Client</AssemblyTitle>
-    <VersionPrefix>1.1.2</VersionPrefix>
+    <VersionPrefix>1.2.0</VersionPrefix>
     <Authors>Sergey Kuznetsov</Authors>
     <TargetFrameworks>net45;netstandard1.3</TargetFrameworks>
     <AssemblyName>Prometheus.Client</AssemblyName>
@@ -23,7 +23,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="protobuf-net" Version="2.3.1" />
+    <PackageReference Include="protobuf-net" Version="2.3.2" />
   </ItemGroup>
 
   <ItemGroup Condition=" '$(TargetFramework)' == 'net45' ">
@@ -32,7 +32,7 @@
   </ItemGroup>
 
   <PropertyGroup Condition=" '$(TargetFramework)' == 'netstandard1.3' ">
-    <DefineConstants>$(DefineConstants);COREFX</DefineConstants>
+    <DefineConstants>$(DefineConstants);NETSTANDART13</DefineConstants>
   </PropertyGroup>
 
   <ItemGroup Condition="'$(TargetFramework)' == 'netstandard1.3'">