fixed sieve

Sieve/Services/SieveProcessor.cs

@@ -431,7 +431,7 @@ namespace Sieve.Services
                             Expression filterValue = GetClosureOverConstant(constantVal, property.PropertyType);
 
 
-                            if (property.PropertyType.Name.ToLower().Equals("string"))//filterTerm.OperatorIsCaseInsensitive Make search insensitive case //comment by thien
+                            if (string.Equals(property.PropertyType.Name,"String",StringComparison.OrdinalIgnoreCase)//filterTerm.OperatorIsCaseInsensitive Make search insensitive case //comment by thien
                             {
                                 //if (property.PropertyType.Name.ToLower().Equals("string"))
                                 //{