Disable users from adding-deleting row/columns

Question

we are running sharepoint 2010 and I would like to setup some type of persmission that will disable certain users from adding-deleting  rows/columns.
any suggestions will be appreciated
thank you

Answer 1

Each list in sharepoint can be assigned certain roles.YOu can break the inheritance for that list and assign a group as a new role to the list.The users belonging to that group will only have access to that list depending to what permissions you give that
group.The code goes something like this:
SPWeb web = (SPWeb)properties.Feature.Parent;
string ListName = "C";
SPList list = web.Lists[ListName];           
            list.BreakRoleInheritance(true);           
string GroupName = "Owners";
SPGroup group = web.SiteGroups[GroupName];
SPGroupCollection removeGroups = web.SiteGroups;
foreach (SPGroup removeGroup
in removeGroups)
if(removeGroup.Name != GroupName)
SPPrincipal principal = (SPPrincipal)removeGroup;               
                    list.RoleAssignments.Remove(principal);
SPRoleDefinition rDefination = web.RoleDefinitions.GetByType(SPRoleType.Administrator);
SPRoleAssignment rAssignment =
new SPRoleAssignment(group);
            rAssignment.RoleDefinitionBindings.Add(rDefination);
            list.RoleAssignments.Add(rAssignment);
            list.Update();