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Break Role Inheritance On List in SharePoint using CSOM

The example in this topic show how to use CSOM to Break Role Inheritance On List in SharePoint

Please follow the steps below to execute the code in Visual Studio using Console Application. You can customize the solution according to your requirements.
Check the article to Connect to SharePoint context using CSOM. This is very helpful if you are doing any programming in CSOM.
Don't forget to use the assemblies as mentioned in the code.

Open your Visual Studio.
From the template, select Console Application as shown in the screenshot
Select the .Net Framework version from the top drop-down as well. You can also change the .Net Framework after creating the solution.
Enter Project Name, Location and Solution Name and click on OK.

using Microsoft.SharePoint.Client;
using System.Linq;
using (ClientContext clientContext = new ClientContext("http://MyServer/sites/MySiteCollection"))
{
// Code to set list with unique permission and assign a particular group on list with desired permission
// This method may not work for Calculated column
// clientcontext.Web.Lists.GetById - This option also can be used to get the list using List GUID
// This value is NOT List internal name
List targetList = clientContext.Web.Lists.GetByTitle("List Title");
// This method takes two parameteres.
// (1) copyRoleAssignments(Boolean) - Specifies whether to copy the role assignments from the parent or not.
// If the value is false, the collection of role assignments must contain only 1 role assignment containing the current user after the operation
// (2) clearSubscopes(Boolean) - clearsubscopes parameter is true, the role assignments for all child objects will be cleared and those objects will inherit role assignments from the current object after this call.
// If the clearsubscopes parameter is false, the role assignments for all child objects which do not inherit role assignments from their parent must remain unchanged.
targetList.BreakRoleInheritance(true, true);
targetList.Update();
clientContext.ExecuteQuery();
}

Thank you for reading this article. This code was tested in SharePoint 2013

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