{sharepoint} Setting List Item Permissions Programatically in sharepoint

namespace Avinash
{
class Program
{
static void Main(string[] args)
{
SetListItemPermission();
}
static void SetListItemPermission ()
{
//Get SPWeb object
SPSite Site = new SPSite("http://<url>");
SPWeb Web = Site.OpenWeb();

//Get Role Definition
SPRoleDefinition RoleDefinition = Web.RoleDefinitions.GetByType(SPRoleType.Administrator);

//Get SPListItem
SPList List = Web.Lists["<list name>"]; // Or you can use Web.GetList method for better performance
SPListItem ListItem = List.Items[1];
//Create new Role Assignment
SPRoleAssignment RoleAssignment = new SPRoleAssignment("<login name>",
"<email address>",
"<display name>",
"");
RoleAssignment.RoleDefinitionBindings.Add(RoleDefinition);
//Break permission if necessary
if(!ListItem.HasUniqueRoleAssignments)
{
ListItem.BreakRoleInheritance(true);
}
//Add Role Assignment to SPListItem's Role Assignment Collection
ListItem.RoleAssignments.Add(RoleAssignment);
ListItem.Update();
}

}
}