Syntax error, '(' - C#

I'm working with C# (in asp.net) and i'm trying to add nested IF in a correct way but i keep getting this 3 errors with the second if (chk1==checked) that say Syntax error, '(' expected , ) expected and ) expected ! can someone help me ?

my code :

protected void CreateUser_Click(object sender, EventArgs e)
{
    var manager = Context.GetOwinContext().GetUserManager<ApplicationUserManager>();
    var signInManager = Context.GetOwinContext().Get<ApplicationSignInManager>();
    var user = new ApplicationUser() { UserName = Email.Text, Email = Email.Text };
    IdentityResult result = manager.Create(user, Password.Text);
    if (result.Succeeded)
    {
        if (chk1==checked)
        {
            signInManager.SignIn( user, isPersistent: false, rememberBrowser: false);
            IdentityHelper.RedirectToReturnUrl(Request.QueryString["ReturnUrl"], Response);
        } else 
            Response.Write("Sorry");

    }
    else 
    {
        ErrorMessage.Text = result.Errors.FirstOrDefault();
    }
}