C# calculate square root with Math.Pow() method

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using System;

public class Program
{
    static double CalculateSqrt(double value)
    {
        return Math.Pow(value, 0.5);
    }

    public static void Main(string[] args)
    {
        // Examples:
        Console.WriteLine( CalculateSqrt(  4   ) ); //  2
        Console.WriteLine( CalculateSqrt(  9   ) ); //  3

        Console.WriteLine( CalculateSqrt(  2   ) ); //  1.4142135623730951
        Console.WriteLine( CalculateSqrt(  0.5 ) ); //  0.7071067811865476
        Console.WriteLine( CalculateSqrt(  0   ) ); //  0
        Console.WriteLine( CalculateSqrt( -1   ) ); //  NaN
    }
}