How do I translate this VB.NET assignment to C#?

I usually program in VB.NET, but am trying to use C#.

In VB.NET, if form1 has a toolStripButton1 and in UserControl I usually write like this:

Dim first As New form1
first.toolStripButton1.enable = False

But in C#, I try:

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private void MyNameMethod() {
    Form1 first = new Form1();
    first. ???????

but it doesn't work. How do I translate the above VB.NET code? I can not select toolStripButton1.

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Make sure toolStripButton1 is actually on Form1 and set to public.

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first.toolStripButton1.enable = false;

The instance is first, form1 is the name of the class.

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Open Form1.Designer.cs [it is default class, may find easily from solution window, under Form1]

At the end of Form1.Designer.cs Controls are listed (as private Controls), change your control to public which you want to access.

Than on your UserControl's cs file add this codes:

private Form1 myForm;
public void AssignForm(Form1 _myForm)
{
    myForm = _myForm
}

private void AccessControl()
{
    myForm.myButton.Enable = ! myForm.myButton.Enable;
}

Open your Form1.cs file and you AssignForm function so that your UserControl may access your main Form. Put this code in your Form1-Constructor:

public Form1()
{
     InitializeComponent();
     myUserControl1.AssignForm(this);
}

This is one of the ways to access to Form1 controls in an easy way.