witam,
potrzebuje pomocy w znalezieniu problemu w kodzie, pojawia się błąd w 8 linijce od konca

#pragma once

namespace operacjenaplikach {
using namespace System::IO;
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>
/// Summary for Form1
/// </summary>
public ref class Form1 : public System::Windows::Forms::Form
{
public:
    Form1(void)
    {
        InitializeComponent();
        //
        //TODO: Add the constructor code here
        //
    }

protected:
    /// <summary>
    /// Clean up any resources being used.
    /// </summary>
    ~Form1()
    {
        if (components)
        {
            delete components;
        }
    }
private: System::Windows::Forms::Button^  button1;
protected: 

private:
    /// <summary>
    /// Required designer variable.
    /// </summary>
    System::ComponentModel::Container ^components;

#pragma region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
void InitializeComponent(void)
{
this->button1 = (gcnew System::Windows::Forms::Button());
this->SuspendLayout();
//
// button1
//
this->button1->Location = System::Drawing::Point(12, 185);
this->button1->Name = L"button1";
this->button1->Size = System::Drawing::Size(75, 65);
this->button1->TabIndex = 0;
this->button1->Text = L"zapis do pliku";
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(284, 262);
this->Controls->Add(this->button1);
this->Name = L"Form1";
this->Text = L"Form1";
this->Load += gcnew System::EventHandler(this, &Form1::Form1_Load);
this->ResumeLayout(false);

    }

#pragma endregion
private: System::Void Form1_Load(System::Object sender, System::EventArgs e) {
}
private: System::Void button1_Click(System::Object sender, System::EventArgs e) {
System::Single liczba_single;
FileStream^ plik_zap = File::Create("Plik.txt");
BinaryWriter^ plik_dane_zap = gcnew BinaryWriter(plik_zap.
System::Text::Encoding::Default);
liczba_single=123.45;
plik_dane_zap->Write(liczba_single);
liczba_single=456.78;
plik_dane_zap->Write(liczba_single);
liczba_single=987.34;
plik_dane_zap->Write(liczba_single);
plik_zap->Close();
}
};