Try this
int indexModifier = 0;
for (int i = 0; i < Math.sqrt(second.Length); ++i)
{
for (int j = 0; j < Math.sqrt(second.Length); ++j)
{
second[j + indexModifier, j] = first[i + indexModifier);
}
++indexModifier;
}
1
solved One Dimensional Array to Multidimensional Array