Join Arrays in Vb. Net [Duplicate]

This is in C#, but surely you can figure it out...

int[] a = new int[] { 1, 2, 3, 4, 5 };
int[] b = new int[] { 6, 7, 8, 9, 10 };
int[] c = a.Union(b).ToArray();

It will be more efficient if instead of calling "ToArray" after the union, if you use the IEnumerable given instead.

int[] a = new int[] { 1, 2, 3, 4, 5 };
int[] b = new int[] { 6, 7, 8, 9, 10 };
IEnumerable<int> c = a.Union(b);