Fix partial read calls (#21999)

Co-authored-by: Andy De George <[email protected]>

Author: tdykstra

.github/workflows/build-validation.yml

@@ -38,14 +38,19 @@ jobs:
     - uses: actions/checkout@a81bbbf8298c0fa03ea29cdc473d45769f953675 #@v2
 
     # Get the latest preview SDK (or sdk not installed by the runner)
-    - name: Setup .NET Core SDK Preview
+    - name: Setup .NET Core SDK
       if: ${{ env.DOTNET_DO_INSTALL == 'true' }}
       run: |
         echo "Downloading dotnet-install.ps1"
         Invoke-WebRequest https://raw.githubusercontent.com/dotnet/install-scripts/master/src/dotnet-install.ps1 -OutFile dotnet-install.ps1
         echo "Installing dotnet version ${{ env.DOTNET_INSTALLER_CHANNEL }}"
         .\dotnet-install.ps1 -InstallDir "c:\program files\dotnet" -Channel "${{ env.DOTNET_INSTALLER_CHANNEL }}"
-      
+    
+    # Print dotnet info
+    - name: Display .NET info
+      run: |
+        dotnet --info
+
     # Install locate projs global tool
     - name: Install LocateProjects tool
       run: |

docs/standard/serialization/snippets/system-text-json-how-to/csharp/JsonConverterFactoryForStackOfT.cs

@@ -38,21 +38,19 @@ public class JsonConverterForStackOfT<T> : JsonConverter<Stack<T>>
         public override Stack<T> Read(
             ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
         {
-            if (reader.TokenType != JsonTokenType.StartArray || !reader.Read())
+            if (reader.TokenType != JsonTokenType.StartArray)
             {
                 throw new JsonException();
             }
+            reader.Read();
 
             var elements = new Stack<T>();
 
             while (reader.TokenType != JsonTokenType.EndArray)
             {
                 elements.Push(JsonSerializer.Deserialize<T>(ref reader, options));
 
-                if (!reader.Read())
-                {
-                    throw new JsonException();
-                }
+                reader.Read();
             }
 
             return elements;

docs/standard/serialization/snippets/system-text-json-how-to/csharp/SystemTextJsonSamples.csproj

@@ -1,8 +1,8 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>netcoreapp3.1</TargetFramework>
+    <TargetFramework>net5.0</TargetFramework>
   </PropertyGroup>
 
   <ItemGroup>

docs/standard/serialization/snippets/system-text-json-how-to/csharp/Utf8WriterToStream.cs

@@ -22,6 +22,7 @@ public static void Run()
             writer.WriteString("date", DateTimeOffset.UtcNow);
             writer.WriteNumber("temp", 42);
             writer.WriteEndObject();
+            writer.Flush();
 
             string json = Encoding.UTF8.GetString(stream.ToArray());
             Console.WriteLine(json);