Cs question from js user, how to get all children?

Material materials = renderer.materials;
for (int i = 0; i < materials.Length && i < m_queues.Length; ++i) {
materials.renderQueue = m_queues*;
this is in cs, I use java- do i don’t know to convert to tell it to get all chidren of the object.
I tried this with it
for ( var renderer in GetComponentsInChildren(Renderer))
_
for (var material in renderer.materials) {*_
but it wont have any it… Could someone help please?

Never mind, I figured out how to do it in java script
with two lines

for ( var renderer in GetComponentsInChildren(Renderer))
for (var material in renderer.materials)
material.renderQueue = queue;