Tag Archives: SPRoleDefinition

You cannot customize permission levels in a web site with inherited permission levels. at Microsoft.SharePoint.SPRoleDefinitionCollection.Add(SPRoleDefinition role)

Okay simple solution here: Make sure that if you are not the root SPWeb and you want to add custom role definitions i.e. SPRoleDefinitions call SPRoleDefinitionCollection.BreakInheritance(bool,bool)

if (!web.IsRootWeb && !web.HasUniqueRoleDefinitions)
      web.RoleDefinitions.BreakInheritance(true, false);
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