From 03e6ccf5d43fd454035352941137168c067b605a Mon Sep 17 00:00:00 2001
From: Dmitry Popov <dmitry@parsec-club.ru>
Date: Fri, 15 Dec 2017 12:36:36 +0300
Subject: [PATCH] v4.2.0: string.MarkdownEncode() extension added

---
 NetTelegramBotApi/NetTelegramBotApi.csproj |  4 ++--
 NetTelegramBotApi/StringExtensions.cs      | 19 +++++++++++++++++++
 TelegramBotDemo-vNext/Program.cs           |  2 +-
 TelegramBotDemo/Program.cs                 |  2 +-
 4 files changed, 23 insertions(+), 4 deletions(-)
 create mode 100644 NetTelegramBotApi/StringExtensions.cs

diff --git a/NetTelegramBotApi/NetTelegramBotApi.csproj b/NetTelegramBotApi/NetTelegramBotApi.csproj
index 4efb3de..056b675 100644
--- a/NetTelegramBotApi/NetTelegramBotApi.csproj
+++ b/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>
diff --git a/NetTelegramBotApi/StringExtensions.cs b/NetTelegramBotApi/StringExtensions.cs
new file mode 100644
index 0000000..3ec5f6c
--- /dev/null
+++ b/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");
+        }
+    }
+}
diff --git a/TelegramBotDemo-vNext/Program.cs b/TelegramBotDemo-vNext/Program.cs
index 808714d..b8e4702 100644
--- a/TelegramBotDemo-vNext/Program.cs
+++ b/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();
diff --git a/TelegramBotDemo/Program.cs b/TelegramBotDemo/Program.cs
index 49bfa1e..27d85e1 100644
--- a/TelegramBotDemo/Program.cs
+++ b/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();