diff --git a/src/redmine-net-api/Serialization/XmlRedmineSerializer.cs b/src/redmine-net-api/Serialization/XmlRedmineSerializer.cs
index 15d585d0..be1764a0 100644
--- a/src/redmine-net-api/Serialization/XmlRedmineSerializer.cs
+++ b/src/redmine-net-api/Serialization/XmlRedmineSerializer.cs
@@ -50,7 +50,7 @@ public XmlRedmineSerializer(XmlWriterSettings xmlWriterSettings)
             }
             catch (Exception ex)
             {
-                throw new RedmineException(ex.Message, ex);
+                throw new RedmineException(ex.GetBaseException().Message, ex);
             }
         }
 
@@ -62,7 +62,7 @@ public XmlRedmineSerializer(XmlWriterSettings xmlWriterSettings)
             }
             catch (Exception ex)
             {
-                throw new RedmineException(ex.Message, ex);
+                throw new RedmineException(ex.GetBaseException().Message, ex);
             }
         }
 
@@ -76,7 +76,7 @@ public XmlRedmineSerializer(XmlWriterSettings xmlWriterSettings)
             }
             catch (Exception ex)
             {
-                throw new RedmineException(ex.Message, ex);
+                throw new RedmineException(ex.GetBaseException().Message, ex);
             }
         }
 #pragma warning restore CA1822
@@ -91,7 +91,7 @@ public string Serialize<T>(T entity) where T : class
             }
             catch (Exception ex)
             {
-                throw new RedmineException(ex.Message, ex);
+                throw new RedmineException(ex.GetBaseException().Message, ex);
             }
         }
 
@@ -109,12 +109,14 @@ public string Serialize<T>(T entity) where T : class
                 throw new ArgumentNullException(nameof(xmlResponse), $"Could not deserialize null or empty input for type '{typeof(T).Name}'.");
             }
 
-            using (TextReader stringReader = new StringReader(xmlResponse))
+            using (var stringReader = new StringReader(xmlResponse))
             {
-                using (var xmlReader = XmlReader.Create(stringReader))
+                using (var xmlReader = XmlTextReaderBuilder.Create(stringReader))
                 {
-                    xmlReader.Read();
-                    xmlReader.Read();
+                    while (xmlReader.NodeType == XmlNodeType.None || xmlReader.NodeType == XmlNodeType.XmlDeclaration)
+                    {
+                        xmlReader.Read();
+                    }
 
                     var totalItems = xmlReader.ReadAttributeAsInt(RedmineKeys.TOTAL_COUNT);
                     
diff --git a/src/redmine-net-api/Types/Permission.cs b/src/redmine-net-api/Types/Permission.cs
index f912a2e9..13fb4e9d 100644
--- a/src/redmine-net-api/Types/Permission.cs
+++ b/src/redmine-net-api/Types/Permission.cs
@@ -54,19 +54,9 @@ public sealed class Permission : IXmlSerializable, IJsonSerializable, IEquatable
         public void ReadXml(XmlReader reader)
         {
             reader.Read();
-            while (!reader.EOF)
+            if (reader.NodeType == XmlNodeType.Text)
             {
-                if (reader.IsEmptyElement && !reader.HasAttributes)
-                {
-                    reader.Read();
-                    continue;
-                }
-
-                switch (reader.Name)
-                {
-                    case RedmineKeys.PERMISSION: Info = reader.ReadElementContentAsString(); break;
-                    default: reader.Read(); break;
-                }
+                Info = reader.Value;
             }
         }