how to use this code in .net?

I need this code which is in Javascript:m1:float[,] m2:float[,]`function multiplyMatrices(m1, m2) {

    return m1.map((row, i) => {

      return m2[0].map((_, j) =>

        row.reduce((acc, _, n) =>

          acc + m1[i][n] * m2[n][j], 0

        )

      )

    });

  }`
```and code: `for (const mRotate of [mRotateX, mRotateY, mRotateZ]) {
          const mVertex = Object.values(vertex).map(_ => [_]);
          const [x, y, z] = multiplyMatrices(mRotate, mVertex).map(e => e.pop());
          
          vertex.x = x;
          vertex.y = y;
          vertex.z = z;
        }` for parameter mRotateX and mRotateY and mRotateZ is `float[,] rotate_x =
{
    {1,0,0 },
    {0,(float)Math.Cos(angle_x), -(float)Math.Sin(angle_x)},
    {0,(float)Math.Sin(angle_x),(float)Math.Cos(angle_x) }
};`