diff --git a/Ctoss.Example/Program.cs b/Ctoss.Example/Program.cs
index 6af4283..35167f8 100644
--- a/Ctoss.Example/Program.cs
+++ b/Ctoss.Example/Program.cs
@@ -12,9 +12,10 @@
     .Entity<ExampleNumericEntity>()
     .Property("virtual", x =>
         (x.SubEntity == null ? -1 : x.SubEntity.A) + (x.SubEntity == null ? -1 : x.SubEntity.B))
+    .Property("mc", x => int.Parse(x.A.ToString()))
     .Apply()
     .Entity<ExampleTextEntity>()
-    .Property(x => x.TextField, settings => { settings.IgnoreCase = true;})
+    .Property(x => x.TextField, settings => { settings.IgnoreCase = true; })
     .Apply();
 
 const string jsonFilter =
@@ -43,7 +44,7 @@
 const string jsonNumericFilter =
     """
     {
-        "virtual": {
+        "mc": {
             "filterType": "number",
             "condition1": {
                 "filterType": "number",
@@ -116,7 +117,8 @@
     .WithPagination(1, 10)
     .ToList();
 
-foreach (var entity in numericEntities) Console.WriteLine($"A: {entity.A}, B: {entity.B}, SubEntity = ({entity.SubEntity.A + entity.SubEntity.B})");
+foreach (var entity in numericEntities)
+    Console.WriteLine($"A: {entity.A}, B: {entity.B}, SubEntity = ({entity.SubEntity.A + entity.SubEntity.B})");
 
 Console.WriteLine("\nText entities:");
 
@@ -125,8 +127,8 @@
     TextField = "abc"
 };
 
-var textEntities = new List<ExampleTextEntity> {textEntity}.AsQueryable()
+var textEntities = new List<ExampleTextEntity> { textEntity }.AsQueryable()
     .WithFilter(jsonTextFilter) // <-- This is the extension method from the ctoss library
     .ToList();
 
-foreach (var entity in textEntities) Console.WriteLine(entity.TextField);
+foreach (var entity in textEntities) Console.WriteLine(entity.TextField);
\ No newline at end of file
diff --git a/Ctoss/Configuration/CtossSettings.cs b/Ctoss/Configuration/CtossSettings.cs
index c0da728..4090fdb 100644
--- a/Ctoss/Configuration/CtossSettings.cs
+++ b/Ctoss/Configuration/CtossSettings.cs
@@ -29,11 +29,16 @@ public static class CtossSettings
         if (propertyMapping == null)
             return null;
 
-        var unaryExpression = (UnaryExpression)propertyMapping.Body;
-        var binaryExpression = (BinaryExpression)unaryExpression.Operand;
-
-        var resultType = binaryExpression.Type;
-        return resultType;
+        var expression = propertyMapping.Body;
+
+        return expression switch
+        {
+            UnaryExpression unaryExpression => unaryExpression.Operand.Type,
+            BinaryExpression binaryExpression => binaryExpression.Type,
+            MethodCallExpression methodCallExpression => methodCallExpression.Method.ReturnType,
+            MemberExpression memberExpression => memberExpression.Type,
+            _ => throw new InvalidOperationException($"Unhandled expression type: {expression.GetType().Name}")
+        };
     }
 
     internal static PropertySettings? GetPropertySettings<TEntity>(string propertyName)