public class Program
 {
 public static void Main(string[] args)
 { 
 Console.WriteLine("您好，北京欢迎你");
 Console.Read();
 }
 }

 public class Startup
 {
 // This method gets called by the runtime. Use this method to add services to the container.
 // For more information on how to configure your application, visit http://go.microsoft.com/fwlink/"您好，北京欢迎你");
 });
 }
 }

 public static void Main(string[] args)
 {
 Console.WriteLine("您好，北京欢迎你");
 try
 {
 Console.WriteLine(Encoding.GetEncoding("GB2312"));
 }
 catch (Exception ex)
 {
 Console.WriteLine(ex.Message);
 }
 Console.Read();
 }
 }

 try
 {
 Encoding.RegisterProvider(CodePagesEncodingProvider.Instance);
 Console.WriteLine(Encoding.GetEncoding("GB2312"));
 }
 catch (Exception ex)
 {
 Console.WriteLine(ex.Message);
 }
 Console.Read();

 "System.Text.Encoding.CodePages/4.0.1": {
 "type": "package",
 "dependencies": {
 "Microsoft.NETCore.Platforms": "1.0.1",
 "System.Collections": "4.0.11",
 "System.Globalization": "4.0.11",
 "System.IO": "4.1.0",
 "System.Reflection": "4.1.0",
 "System.Resources.ResourceManager": "4.0.1",
 "System.Runtime": "4.1.0",
 "System.Runtime.Extensions": "4.1.0",
 "System.Runtime.Handles": "4.0.1",
 "System.Runtime.InteropServices": "4.1.0",
 "System.Text.Encoding": "4.0.11",
 "System.Threading": "4.0.11"
 },
 "compile": {
 "ref/netstandard1.3/System.Text.Encoding.CodePages.dll": {}
 },
 "runtimeTargets": {
 "runtimes/unix/lib/netstandard1.3/System.Text.Encoding.CodePages.dll": {
 "assetType": "runtime",
 "rid": "unix"
 },
 "runtimes/win/lib/netstandard1.3/System.Text.Encoding.CodePages.dll": {
 "assetType": "runtime",
 "rid": "win"
 }
 }
 },

 try
 {
 Encoding.RegisterProvider(CodePagesEncodingProvider.Instance);
 Console.WriteLine(Encoding.GetEncoding("GB2312"));
 Console.WriteLine("您好，北京欢迎你");
 }
 catch (Exception ex)
 {
 Console.WriteLine(ex.Message);
 }