.NET Core Razor C# functions [duplicate]

Question

I'm pretty new to .NET Core (ASP.NET on the whole) and I was wondering if I'm doing anything obviously wrong when trying to create a C# function inside my View

my view is as follows (Collections.cshtml)

<h2>Collections</h2>

<div id="content">

    @{
        // define variables
        List<string> collections;
        int counter;

        // build list
        collections = new List<string>();
        collections.Add("Nothing 01");
        collections.Add("Nothing 02");

        // display list
        counter = 0;
        while(counter < collections.Count)
        {
            <p>@collections[counter]</p>
            counter = counter + 1;
        }
    }

</div>

That all works fine and does what I want it to do but if I try to organize it into functions or even add a basic function it breaks like bellow

@{
    // function for no reason
    public void testFunc()
    {
        string nothing;
        nothing = null;
        return;
    }
}

<h2>Collections</h2>

<div id="content">

    @{
        // define variables
        List<string> collections;
        int counter;

        // build list
        collections = new List<string>();
        collections.Add("Nothing 01");
        collections.Add("Nothing 02");

        // display list
        counter = 0;
        while(counter < collections.Count)
        {
            <p>@collections[counter]</p>
            counter = counter + 1;
        }
    }

</div>

Just adding that function breaks it and I'm not sure why

Answer 1

They go in the @functions section, and you don't need an accessibility modifier:

@functions {
    // function for no reason
    void testFunc()
    {
        string nothing;
        nothing = null;
        return;
    }
}