fix structure in Summary

Author: phnx47

examples/WebApiApplication/WebApiApplication.csproj

@@ -23,6 +23,7 @@
     <UseGlobalApplicationHostFile />
     <NuGetPackageImportStamp>
     </NuGetPackageImportStamp>
+    <Use64BitIISExpress />
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
     <DebugSymbols>true</DebugSymbols>
@@ -47,8 +48,8 @@
       <HintPath>..\..\packages\Microsoft.CodeDom.Providers.DotNetCompilerPlatform.1.0.3\lib\net45\Microsoft.CodeDom.Providers.DotNetCompilerPlatform.dll</HintPath>
     </Reference>
     <Reference Include="Microsoft.CSharp" />
-    <Reference Include="protobuf-net, Version=2.3.1.0, Culture=neutral, PublicKeyToken=257b51d87d2e4d67, processorArchitecture=MSIL">
-      <HintPath>..\..\packages\protobuf-net.2.3.1\lib\net40\protobuf-net.dll</HintPath>
+    <Reference Include="protobuf-net, Version=2.3.2.0, Culture=neutral, PublicKeyToken=257b51d87d2e4d67, processorArchitecture=MSIL">
+      <HintPath>..\..\packages\protobuf-net.2.3.2\lib\net40\protobuf-net.dll</HintPath>
     </Reference>
     <Reference Include="System.Net.Http" />
     <Reference Include="System.Web.DynamicData" />

examples/WebApiApplication/packages.config

@@ -7,5 +7,5 @@
   <package id="Microsoft.CodeDom.Providers.DotNetCompilerPlatform" version="1.0.3" targetFramework="net452" />
   <package id="Microsoft.Net.Compilers" version="1.3.2" targetFramework="net452" developmentDependency="true" />
   <package id="Newtonsoft.Json" version="6.0.4" targetFramework="net452" />
-  <package id="protobuf-net" version="2.3.1" targetFramework="net452" />
+  <package id="protobuf-net" version="2.3.2" targetFramework="net452" />
 </packages>

src/Prometheus.Client/SummaryImpl/Sample.cs

@@ -3,8 +3,8 @@
     // Sample holds an observed value and meta information for compression. 
     public struct Sample
     {
-        public double Value;
-        public double Width;
-        public double Delta;
+        public double Value { get; set; }
+        public double Width { get; set; }
+        public double Delta { get; set; }
     }
 }

src/Prometheus.Client/SummaryImpl/SampleStream.cs

@@ -5,9 +5,10 @@ namespace Prometheus.Client.SummaryImpl
 {
     public class SampleStream
     {
-        public double N;
-        readonly List<Sample> _samples = new List<Sample>();
-        readonly Invariant _invariant;
+        private readonly List<Sample> _samples = new List<Sample>();
+        private readonly Invariant _invariant;
+
+        public double N { get; set; }
 
         public SampleStream(Invariant invariant)
         {