06B, 13, 14, 15 marked not to compile
MODIFY
src/Chapter20.Tests/Listing19.13.Tests.cs
src/Chapter20.Tests/Listing19.13.Tests.cs
-using AddisonWesley.Michaelis.EssentialCSharp.Chapter20.Listing20_13.Tests;
+using AddisonWesley.Michaelis.EssentialCSharp.Chapter20.Listing20_01.Tests;
using Microsoft.VisualStudio.TestTools.UnitTesting;
using System;
using System.Linq;
using System.Threading.Tasks;
-namespace AddisonWesley.Michaelis.EssentialCSharp.Chapter20.Listing20_13.Tests
+namespace AddisonWesley.Michaelis.EssentialCSharp.Chapter20.Listing20_01.Tests
{
[TestClass]

MODIFY
src/Chapter20/Chapter20.csproj
src/Chapter20/Chapter20.csproj
<ProductName>Chapter20</ProductName>
</PropertyGroup>
<Import Project="..\Chapter.props" />
+ <ItemGroup>
+ <Compile Remove="Listing20.06B.SignaturesOfAsyncEnumerableSelectMethods.cs" />
+ <Compile Remove="Listing20.13.SynchronousHighLatencyInvocationInWPF.cs" />
+ <Compile Remove="Listing20.14.SynchronousHighLatencyInvocationInWPFUsingAwait.cs" />
+ <Compile Remove="Listing20.15.IteratingOverAwaitOperation.cs" />
+ </ItemGroup>
<ItemGroup>
<Compile Include="..\Shared\Program.cs">
<Link>Program.cs</Link>
<Compile Include="..\Shared\PiCalculator.cs">
<Link>PiCalculator.cs</Link>
</Compile>
+ <None Include="Listing20.06B.SignaturesOfAsyncEnumerableSelectMethods.cs" />
+ <None Include="Listing20.13.SynchronousHighLatencyInvocationInWPF.cs" />
+ <None Include="Listing20.14.SynchronousHighLatencyInvocationInWPFUsingAwait.cs" />
+ <None Include="Listing20.15.IteratingOverAwaitOperation.cs" />
<PackageReference Include="System.Linq.Async" Version="4.0.0" />
</ItemGroup>
</Project>

06B, 13, 14, 15 marked not to compile