example of obfuscate application

obfuscar.xml

<?xml version='1.0'?>
<Obfuscator>
  <Var name="InPath" value=".\Obfuscator_Input" />
  <Var name="OutPath" value=".\Obfuscator_Output" />
  <Var name="HidePrivateApi" value="true" />

  <Module file="$(InPath)\ftpTest.exe" />
  <!--Module file="$(InPath)\ftpTest.dll" /-->
</Obfuscator>

ObfuscateByDotfuscator.cs

using System;
using System.ComponentModel;
using System.Drawing;
using System.Net;
using System.Runtime.CompilerServices;
using System.Windows.Forms;
namespace ftpTEST
{
    public class Form1 : Form
    {
        private IContainer a = null;
        private Button b;
        [CompilerGenerated]
        private static EventHandler c;
        public Form1()
        {
            this.a();
            Control arg_3B_0 = this.b;
            if (Form1.c == null)
            {
                Form1.c = new EventHandler(Form1.a);
            }
            arg_3B_0.Click += Form1.c;
        }
        public static void DownloadFile(string server, int port, string username, string password, string remoteFilePath, string localFilePath)
        {
            using (WebClient webClient = new WebClient())
            {
                webClient.Credentials = new NetworkCredential(username, password);
                webClient.DownloadFile(string.Format("ftp://{0}:{1}/{2}", server, port, remoteFilePath), localFilePath);
            }
            MessageBox.Show("done");
        }
        protected override void Dispose(bool disposing)
        {
            if (disposing && this.a != null)
            {
                this.a.Dispose();
            }
            base.Dispose(disposing);
        }
        private void a()
        {
            this.b = new Button();
            base.SuspendLayout();
            this.b.Location = new Point(12, 22);
            this.b.Name = "btnDownload";
            this.b.Size = new Size(131, 35);
            this.b.TabIndex = 11;
            this.b.Text = "下載";
            this.b.UseVisualStyleBackColor = true;
            base.AutoScaleDimensions = new SizeF(6f, 12f);
            base.AutoScaleMode = AutoScaleMode.Font;
            base.ClientSize = new Size(161, 76);
            base.Controls.Add(this.b);
            base.Name = "Form1";
            this.Text = "Form1";
            base.ResumeLayout(false);
        }
        [CompilerGenerated]
        private static void a(object A_0, EventArgs A_1)
        {
            Form1.DownloadFile("SERVER", 21, "username", "password", "remoteFile", "localSavedPath");
        }
    }
}

ObfuscateByObfuscar.cs

using <PrivateImplementationDetails>{24232FCF-358C-4534-BF21-45F921EA8161};
using System;
using System.ComponentModel;
using System.Drawing;
using System.Net;
using System.Runtime.CompilerServices;
using System.Windows.Forms;
namespace A
{
    public class A : Form
    {
        private IContainer A = null;
        private Button A;
        [CompilerGenerated]
        private static EventHandler A;
        public A()
        {
            this.A();
            Control arg_3B_0 = this.A;
            if (global::A.A.A == null)
            {
                global::A.A.A = new EventHandler(global::A.A.A);
            }
            arg_3B_0.Click += global::A.A.A;
        }
        public static void A(string arg, int num, string userName, string password, string arg2, string fileName)
        {
            using (WebClient webClient = new WebClient())
            {
                webClient.Credentials = new NetworkCredential(userName, password);
                webClient.DownloadFile(string.Format(.A(), arg, num, arg2), fileName);
            }
            MessageBox.Show(.a());
        }
        protected override void Dispose(bool flag)
        {
            if (flag && this.A != null)
            {
                this.A.Dispose();
            }
            base.Dispose(flag);
        }
        private void A()
        {
            this.A = new Button();
            base.SuspendLayout();
            this.A.Location = new Point(12, 22);
            this.A.Name = .B();
            this.A.Size = new Size(131, 35);
            this.A.TabIndex = 11;
            this.A.Text = .b();
            this.A.UseVisualStyleBackColor = true;
            base.AutoScaleDimensions = new SizeF(6f, 12f);
            base.AutoScaleMode = AutoScaleMode.Font;
            base.ClientSize = new Size(161, 76);
            base.Controls.Add(this.A);
            base.Name = .C();
            this.Text = .C();
            base.ResumeLayout(false);
        }
        [CompilerGenerated]
        private static void A(object obj, EventArgs eventArgs)
        {
            global::A.A.A(.c(), 21, .D(), .d(), .E(), .e());
        }
    }
}

Release.proj

<?xml version="1.0" encoding="utf-8" ?>
<Project DefaultTargets="BuildAll" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">

    <!--
        Release.proj:
            Builds and obfuscates a release.

        You can make msbuild build the release by running the following command:

            msbuild Release.proj
    -->

    <!-- default to release build -->
    <PropertyGroup Condition="!Exists('$(Configuration)')">
        <Configuration>Release</Configuration>
    </PropertyGroup>

    <!-- paths for finding bits -->
    <PropertyGroup>
        <BasePath>$(MSBuildProjectDirectory)</BasePath>
        <ExePath>$(BasePath)</ExePath>
        <!--DllPath>$(BasePath)</DllPath-->
    </PropertyGroup>

    <!-- obfuscator bits -->
    <PropertyGroup>
        <ObfuscatorExe>$(BasePath)\obfuscar.Console.exe</ObfuscatorExe>
        <ObfuscatorProject>$(BasePath)\obfuscar.xml</ObfuscatorProject>
        <ObfuscatorInput>$(BasePath)\Obfuscator_Input</ObfuscatorInput>
        <ObfuscatorOutput>$(BasePath)\Obfuscator_Output</ObfuscatorOutput>
    </PropertyGroup>

    <ItemGroup>
        <!-- main exes -->
        <ObfuscatedFile Include="$(ExePath)\ftpTest.exe" />
        <!--ObfuscatedFile Include="$(DllPath)\ftpTest.dll" /-->
    </ItemGroup>

    <ItemGroup>
        <!--CompileSolution Include="$(BasePath)\ftpTest.sln" /-->        
    </ItemGroup>

    <!-- clean, compile and package! -->
    <Target Name="BuildAll" DependsOnTargets="Prepare;Clean;Compile;Obfuscate" />

    <!-- clean outputs and temp obfuscation files -->
    <Target Name="Clean">
        <MSBuild Projects="@(CompileProject);@(CompileSolution)"
            Properties="Configuration=$(Configuration)"
            Targets="Clean" />

        <RemoveDir Directories="Final" />
        <RemoveDir Directories="$(ObfuscatorInput)" />
        <RemoveDir Directories="$(ObfuscatorOutput)" />
    </Target>

    <!-- prepare -->
    <Target Name="Prepare">
        <MSBuild Projects="@(CompileObfuscar)"
            Properties="Configuration=$(Configuration);BuildType=$(BuildType)" />
    </Target>
    
    <!-- compile -->
    <Target Name="Compile">
        <MSBuild Projects="@(CompileSolution)"
            Properties="Configuration=$(Configuration);BuildType=$(BuildType)" />
    </Target>

    <!-- copies files that are to be obfuscated -->
    <Target Name="CopyObfuscatedFiles"
        DependsOnTargets="Compile">
        <MakeDir Directories="$(ObfuscatorInput)" />

        <!-- copy files that will be obfuscated to obfuscator input -->
        <Copy SourceFiles="@(ObfuscatedFile)"
            DestinationFolder="$(ObfuscatorInput)" />
    </Target>

    <!-- obfuscate -->
    <Target Name="Obfuscate"
        DependsOnTargets="CopyObfuscatedFiles">
        <MakeDir Directories="$(ObfuscatorOutput)" />
        <Exec Command='"$(ObfuscatorExe)" "$(ObfuscatorProject)"' />
        <Copy SourceFiles="@(ObfuscatedFile->'$(ObfuscatorOutput)\%(filename)%(extension)')"
            DestinationFolder="Final" />
        <Copy SourceFiles="$(ObfuscatorOutput)\Mapping.txt"
            DestinationFolder="Final" />
    </Target>
</Project>

Unobfuscate.cs

using System;
using System.ComponentModel;
using System.Drawing;
using System.Net;
using System.Windows.Forms;
namespace ftpTEST
{
    public class Form1 : Form
    {
        private IContainer components = null;
        private Button btnDownloadRltn;
        public Form1()
        {
            this.InitializeComponent();
            this.btnDownloadRltn.Click += delegate(object s, EventArgs e)
            {
                Form1.DownloadFile("SERVER", 21, "username", "password", "remoteFile", "localSavedPath");
            };
        }
        public static void DownloadFile(string server, int port, string username, string password, string remoteFilePath, string localFilePath)
        {
            using (WebClient webClient = new WebClient())
            {
                webClient.Credentials = new NetworkCredential(username, password);
                webClient.DownloadFile(string.Format("ftp://{0}:{1}/{2}", server, port, remoteFilePath), localFilePath);
            }
            MessageBox.Show("done");
        }
        protected override void Dispose(bool disposing)
        {
            if (disposing && this.components != null)
            {
                this.components.Dispose();
            }
            base.Dispose(disposing);
        }
        private void InitializeComponent()
        {
            this.btnDownloadRltn = new Button();
            base.SuspendLayout();
            this.btnDownloadRltn.Location = new Point(12, 22);
            this.btnDownloadRltn.Name = "btnDownload";
            this.btnDownloadRltn.Size = new Size(131, 35);
            this.btnDownloadRltn.TabIndex = 11;
            this.btnDownloadRltn.Text = "下載";
            this.btnDownloadRltn.UseVisualStyleBackColor = true;
            base.AutoScaleDimensions = new SizeF(6f, 12f);
            base.AutoScaleMode = AutoScaleMode.Font;
            base.ClientSize = new Size(161, 76);
            base.Controls.Add(this.btnDownloadRltn);
            base.Name = "Form1";
            this.Text = "Form1";
            base.ResumeLayout(false);
        }
    }
}