diff --git a/sources/OpenMcdf.Extensions/OLEProperties/OLEPropertiesContainer.cs b/sources/OpenMcdf.Extensions/OLEProperties/OLEPropertiesContainer.cs
index 6ac01193..c2fa0feb 100644
--- a/sources/OpenMcdf.Extensions/OLEProperties/OLEPropertiesContainer.cs
+++ b/sources/OpenMcdf.Extensions/OLEProperties/OLEPropertiesContainer.cs
@@ -14,10 +14,10 @@ public class OLEPropertiesContainer
 
         public bool HasUserDefinedProperties { get; private set; }
 
-        public ContainerType ContainerType { get; internal set; }
+        public ContainerType ContainerType { get; }
         private Guid? FmtID0 { get; }
 
-        public PropertyContext Context { get; private set; }
+        public PropertyContext Context { get; }
 
         private readonly List<OLEProperty> properties = new List<OLEProperty>();
         internal CFStream cfStream;
@@ -126,8 +126,6 @@ internal OLEPropertiesContainer(CFStream cfStream)
                 UserDefinedProperties = new OLEPropertiesContainer(pStream.PropertySet1.PropertyContext.CodePage, ContainerType.UserDefinedProperties);
                 HasUserDefinedProperties = true;
 
-                UserDefinedProperties.ContainerType = ContainerType.UserDefinedProperties;
-
                 for (int i = 0; i < pStream.PropertySet1.Properties.Count; i++)
                 {
                     if (pStream.PropertySet1.PropertyIdentifierAndOffsets[i].PropertyIdentifier == 0) continue;