static void Main(string[] args)
{
var item = new MyType();
// Option 1 - Implicit cast. Compile time checked but takes two lines.
IMyType item2 = item;
System.Console.WriteLine(item2.SayHello());
// Option 2 - One line but risks an InvalidCastException at runtime if MyType changes.
System.Console.WriteLine(((IMyType)item).SayHello());
// Option 3 - One line but risks a NullReferenceException at runtime if MyType changes.
System.Console.WriteLine((item as IMyType).SayHello());
// Option 4 - compile time one liner
Converter.ReturnAs <IMyType>(item).SayHello();
}
// This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
public void Configure(IApplicationBuilder app, IHostingEnvironment env,
IApplicationLifetime appLifetime, IMyType myType)
{
myType.SayHello();
if (env.IsDevelopment())
{
app.UseDeveloperExceptionPage();
}
else
{
app.UseExceptionHandler("/Home/Error");
}
app.UseStaticFiles();
app.UseCookiePolicy();
app.UseMvc(routes =>
{
routes.MapRoute(
name: "default",
template: "{controller=Home}/{action=Index}/{id?}");
});
}