using System;

​

bool AreSame(double[] r1, double[] r2) {

    bool areSame = r1.Length == r2.Length;

    for (int i = 0; i < r1.Length && areSame; i++) {

        if (r1[i] != r2[i]) {

            areSame = false;

        }

    }

    return areSame;

}

​

bool IsRowEmbedded(double[][] m, double[] r) {

    bool isFound = false;

    for (int i = 0; i < m.Length && !isFound; i++) {

        if (AreSame(m[i], r)) {

            isFound = true;

        }

    }

    return isFound;

}

​

double[][] m =  {new double[]{20, 23, 35},

                 new double[]{40, 42},

                 new double[]{70},

                 new double[]{100, 101, 110}};

double[] r = {40, 42};

Console.WriteLine(IsRowEmbedded(m, r));

r[0]++;

Console.Write(IsRowEmbedded(m, r));