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Demos/DemoAction.cs

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+using System;
+
+public class DemoAction
+{
+    private Action justAnAction;
+
+    private Action<T> AsAction<T>()
+    {
+        var name = typeof(T).Name;
+        return v => Console.WriteLine(name);
+    }
+
+    private void ContrivedMethod()
+    {
+        var willTakeString = AsAction<string>();
+
+        willTakeString("Hello world");
+        // outputs: String
+
+        //type safety - squiggly
+        willTakeString("1");
+    }
+
+    Action<string> takesString; // and does stuff with it
+    Action<int, string> takesIntAndString; // and does stuff with it
+
+    Action<object> takesAnyObject;
+
+    Action<int, int, int, int, int, int, int, int, int, int, int, int, int, int, int, int> takesMaximum;
+    // I've never used so many - so don't worry
+}

Demos/DemoFunc.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+
+public class DemoFunc
+{
+    private Func<int> intFunc;
+
+    private Func<T> AsFunc<T>(T input)
+    {
+        return () => input;
+    }
+
+    private T Exec<T>(Func<T> func)
+    {
+        return func();
+    }
+
+
+    public void ContrivedMethod()
+    {
+        Func<string> helloWorldFunc = AsFunc("Hello World!");
+        var helloWorld = Exec(helloWorldFunc);
+        // helloWorld == "Hello World!"
+        
+        intFunc = AsFunc(1);
+        var one = Exec(intFunc);
+        // one == 1);
+    }
+
+
+    public void SomewhatMoreRealisticMethod()
+    {
+        // cant use var - because we need to tell the compiler what we'll describe
+        Func<IEnumerable<BooksByAuthor>, string, bool> authorExists =
+            (booksByAuthor, authorName) => booksByAuthor.Any(ba => ba.Author == authorName);
+
+
+        Func<IEnumerable<BooksByAuthor>, string, BooksByAuthor> getGataloguedAuthor =
+            (booksByAuthor, authorName) => {
+                // can do complex stuff or help in debugging
+                return booksByAuthor.FirstOrDefault(ba => ba.Author == authorName);
+            };
+
+
+        var bas = Enumerable.Empty<BooksByAuthor>();// for conciceness
+
+        var exits = authorExists(bas, "Homer");
+
+        var homersBooks = getGataloguedAuthor(bas, "Homer");
+    }
+}

Demos/Demos.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>netcoreapp2.0</TargetFramework>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\Books.ConsoleApp\Books.ConsoleApp.csproj" />
+  </ItemGroup>
+
+</Project>

Demos/Program.cs

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+using System;
+
+namespace Demos
+{
+    class Program
+    {
+        static void Main(string[] args)
+        {
+            Console.WriteLine("Hello World!");
+        }
+    }
+}