How to Update Permission of Document using CSOM

Question

How to Update Permission of SharePoint Document library item using CSOM C#

Ramesh Palaniappan · Answer

Using below code RoleDefinitionBindingCollectionrd= new RoleDefinitionBindingCollection(ctx); rd.Add(ctx.Web.RoleDefinitions.GetByName( Read )); Principaluser=ctx.Web.EnsureUser( Domain\ID12345 ); item.BreakRoleInheritance( false  false ); item.RoleAssignments.Add(userrd); item.Update(); ctx.ExecuteQuery();