Assign the custom permission Level to the user using Client Object Model

In this blog we will be seeing how to assign the custom permission Level to the user using Client Object Model

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Microsoft.SharePoint;
using Microsoft.SharePoint.Client;
namespace ClientObjectModel
{
class Program
{
static void Main(string[] args)
{

//Assign the custom permission Level to the user

string siteURL = "http://serverName:1111/sites/SPSiteDataQuery/";
ClientContext context = new ClientContext(siteURL);
User user=context.Web.EnsureUser(@"DomainName\UserName");
RoleDefinition roleDefinition=context.Web.RoleDefinitions.GetByName("Custom Permission Level");
RoleDefinitionBindingCollection roleDefinitionBindingColl=new RoleDefinitionBindingCollection (context);
roleDefinitionBindingColl.Add(roleDefinition);
RoleAssignment roleAssign=context.Web.RoleAssignments.Add(user,roleDefinitionBindingColl);
context.ExecuteQuery();
}
}
}