Why does C# disallow readonly local variables?

Question

Having a friendly debate with a co-worker about this. We have some thoughts about this, but wondering what the SO crowd thinks about this?

Answer 1

use const keyword to make read only variable.

reference: https://docs.microsoft.com/en-us/dotnet/csharp/language-reference/keywords/const

public class SealedTest
{
    static void Main()
    {
        const int c = 707;
        Console.WriteLine("My local constant = {0}", c);
    }
}