More intern's

Author: Alexander Kot

src/NHibernate/Persister/Entity/AbstractEntityPersister.cs

@@ -2376,14 +2376,14 @@ protected void InitSubclassPropertyAliasesMap(PersistentClass model)
 				{
 					if (entityMetamodel.HasNonIdentifierPropertyNamedId)
 					{
-						subclassPropertyAliases[EntityPersister.EntityID + "." + idPropertyNames[i]] = new string[] { idAliases[i] };
-						subclassPropertyColumnNames[EntityPersister.EntityID + "." + IdentifierPropertyName + "." + idPropertyNames[i]] = new string[] { idColumnNames[i] };
+						subclassPropertyAliases[string.Intern(EntityPersister.EntityID + "." + idPropertyNames[i])] = new string[] { idAliases[i] };
+						subclassPropertyColumnNames[string.Intern(EntityPersister.EntityID + "." + IdentifierPropertyName + "." + idPropertyNames[i])] = new string[] { idColumnNames[i] };
 					}
 					//				if (hasIdentifierProperty() && !ENTITY_ID.equals( getIdentifierPropertyName() ) ) {
 					if (HasIdentifierProperty)
 					{
-						subclassPropertyAliases[IdentifierPropertyName + "." + idPropertyNames[i]] = new string[] { idAliases[i] };
-						subclassPropertyColumnNames[IdentifierPropertyName + "." + idPropertyNames[i]] = new string[] { idColumnNames[i] };
+						subclassPropertyAliases[string.Intern(IdentifierPropertyName + "." + idPropertyNames[i])] = new string[] { idAliases[i] };
+						subclassPropertyColumnNames[string.Intern(IdentifierPropertyName + "." + idPropertyNames[i])] = new string[] { idColumnNames[i] };
 					}
 					else
 					{

src/NHibernate/Tuple/Entity/EntityMetamodel.cs

@@ -449,7 +449,7 @@ private void MapIdentifierPropertyTypes(string path, IType propertyType)
 				for (var i = 0; i < componentType.PropertyNames.Length; i++)
 				{
 					MapIdentifierPropertyTypes(
-						!string.IsNullOrEmpty(path) ? $"{path}.{componentType.PropertyNames[i]}" : componentType.PropertyNames[i],
+						!string.IsNullOrEmpty(path) ? string.Intern($"{path}.{componentType.PropertyNames[i]}") : componentType.PropertyNames[i],
 						componentType.Subtypes[i]);
 				}
 			}