Equality comparison between multiple variables

Question

I\'ve a situation where I need to check whether multiple variables are having same data such as

var x=1;
var y=1;
var z=1;

I want to check

Answer 1

Actually i don't have to the time to code, but an extension method with linq like this

public bool EqualsToAll(this T element, IEnumerable source)
{
    if(element == null)
        throw new ArgumentNullException(element);

    foreach(var item in source)
    {
        if(!element.Equals(item)
            return false;
    }

    return true;
}

should make it.

Warning: This code was not tested, nor written within an IDE.