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

if (x == y && y == z && z == 1)

is the best you can do, because

y == z evaluates to a boolean and you can't compare x with the result:

x == (y == z)

|    |

int  bool

I would do this:

public bool AllEqual(params T[] values) {
    if(values == null || values.Length == 0)
         return true;
    return values.All(v => v.Equals(values[0]));    
}

// ...

if(AllEqual(x, y, z)) { ... }