json Data For d3js in mvc4

json Data For d3js in mvc4

{
"name": "Planetskool",
"children": [
{
"name": "Neeraj",
"children": [
{
"name": "cluster",
"children": [
{ "name": "MVC4", "size": 3938 },
{ "name": "HTML5", "size": 3812 },
{ "name": "MVC4", "size": 6714 },
{ "name": "MVC4", "size": 743 }
]
},
I am getting this output in json File of the D3js Tree structure.
How can I get the root node and child node from my database in mvc4
instead of this static value in json file?