fixed

Sieve/Services/SieveProcessor.cs

@@ -427,7 +427,7 @@ namespace Sieve.Services
                             Expression filterValue = GetClosureOverConstant(constantVal, property.PropertyType);
 
 
-                            /*if (filterTerm.OperatorIsCaseInsensitive)
+                            if (filterTerm.OperatorIsCaseInsensitive)
                             {
                                 propertyValue = Expression.Call(propertyValue,
                                     typeof(string).GetMethods()
@@ -436,7 +436,7 @@ namespace Sieve.Services
                                 filterValue = Expression.Call(filterValue,
                                     typeof(string).GetMethods()
                                     .First(m => m.Name == "ToUpper" && m.GetParameters().Length == 0));
-                            }*/
+                            }
 
                             var expression = GetExpression(filterTerm, filterValue, propertyValue, bCaseSensitive);