v4.2.0: string.MarkdownEncode() extension added

Author: justdmitry

NetTelegramBotApi/NetTelegramBotApi.csproj

@@ -3,13 +3,13 @@
   <PropertyGroup>
     <Description>Telegram Bot API library</Description>
     <AssemblyTitle>NetTelegramBotApi</AssemblyTitle>
-    <VersionPrefix>4.1.0</VersionPrefix>
+    <Version>4.2.0</Version>
     <TargetFrameworks>net45;net46;netstandard1.3</TargetFrameworks>
     <NetStandardImplicitPackageVersion>1.6.0</NetStandardImplicitPackageVersion>
     <AssemblyName>NetTelegramBotApi</AssemblyName>
     <PackageId>NetTelegramBotApi</PackageId>
     <PackageTags>telegram;bot;api</PackageTags>
-    <PackageReleaseNotes>See https://github.com/justdmitry/NetTelegramBotApi/releases/tag/v4.0.0</PackageReleaseNotes>
+    <PackageReleaseNotes>See https://github.com/justdmitry/NetTelegramBotApi/releases/tag/v4.2.0</PackageReleaseNotes>
     <PackageIconUrl>https://raw.githubusercontent.com/justdmitry/NetTelegramBotApi/master/package-icon.gif</PackageIconUrl>
     <PackageProjectUrl>https://github.com/justdmitry/NetTelegramBotApi</PackageProjectUrl>
     <RepositoryType>git</RepositoryType>

NetTelegramBotApi/StringExtensions.cs

@@ -0,0 +1,19 @@
+namespace System
+{
+    using System.Text.RegularExpressions;
+
+    public static class StringExtensions
+    {
+        private static readonly Regex WrongChars = new Regex(@"([\*_`\[\]\(\)])");
+
+        public static string MarkdownEncode(this string value)
+        {
+            if (string.IsNullOrWhiteSpace(value))
+            {
+                return value;
+            }
+
+            return WrongChars.Replace(value, @"\$1");
+        }
+    }
+}

TelegramBotDemo-vNext/Program.cs

@@ -200,7 +200,7 @@ public static void RunBot(string accessToken)
                         {
                             bot.MakeRequestAsync(new SendMessage(
                                 update.Message.Chat.Id,
-                                "You wrote *" + update.Message.Text.Length + " characters*")
+                                "You wrote: \r\n" + update.Message.Text.MarkdownEncode())
                             {
                                 ParseMode = SendMessage.ParseModeEnum.Markdown
                             }).Wait();

TelegramBotDemo/Program.cs

@@ -171,7 +171,7 @@ public static void RunBot(string accessToken)
                         {
                             bot.MakeRequestAsync(new SendMessage(
                                 update.Message.Chat.Id,
-                                "You wrote *" + update.Message.Text.Length + " characters*")
+                                "You wrote: \r\n_" + update.Message.Text.MarkdownEncode() + "_")
                             {
                                 ParseMode = SendMessage.ParseModeEnum.Markdown
                             }).Wait();