hello world program error

okay, i think i wrote code in right syntax, but i just can compile simples hello world program. I'm using visual studio 2010, and trying to write hello world in form, but i can't get past error: "Error    1    error C2143: syntax error : missing ';' before '.' 79".

here is the code:


#pragma once

namespace HelloWorld {

    using namespace System;
    using namespace System::ComponentModel;
    using namespace System::Collections;
    using namespace System::Windows::Forms;
    using namespace System::Data;
    using namespace System::Drawing;

    ///

    /// Summary for Form1
    ///

    public ref class Form1 : public System::Windows::Forms::Form
    {
    public:
        Form1(void)
        {
            InitializeComponent();
            //
            //TODO: Add the constructor code here
            //
        }

    protected:
        ///

        /// Clean up any resources being used.
        ///

        ~Form1()
        {
            if (components)
            {
                delete components;
            }
        }
    private: System::Windows::Forms::Button^  button1;
    protected:

    private:
        ///

        /// Required designer variable.
        ///

        System::ComponentModel::Container ^components;

#pragma region Windows Form Designer generated code
        ///

        /// Required method for Designer support - do not modify
        /// the contents of this method with the code editor.
        ///

        void InitializeComponent(void)
        {
            this->button1 = (gcnew System::Windows::Forms::Button());
            this->SuspendLayout();
            //
            // button1
            //
            this->button1->Location = System::Drawing::Point(77, 84);
            this->button1->Name = L"button1";
            this->button1->Size = System::Drawing::Size(100, 36);
            this->button1->TabIndex = 0;
            this->button1->Text = L"button1";
            this->button1->UseVisualStyleBackColor = true;
            this->button1->Click += gcnew System::EventHandler(this, &Form1::button1_Click);
            //
            // Form1
            //
            this->AutoScaleDimensions = System::Drawing::SizeF(6, 13);
            this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font;
            this->ClientSize = System::Drawing::Size(292, 273);
            this->Controls->Add(this->button1);
            this->Name = L"Form1";
            this->Text = L"Form1";
            this->ResumeLayout(false);

        }
#pragma endregion
    private: System::Void button1_Click(System::Object^  sender, System::EventArgs^  e) {
                 MessageBox.Show("Hello World"); //line 79
             }
    };
}

I would appreciate any help.