Update SqlServerOrmLiteDialectProvider.cs

Fixed datetime to iso conversion.
Datetime tests failed with sql error, the time was converted as
20130317 21.29.01.678 instead of 20130317 21:29:01.678

Author: andreabalducci

src/ServiceStack.OrmLite.SqlServer/SqlServerOrmLiteDialectProvider.cs

@@ -2,6 +2,7 @@
 using System.Collections.Generic;
 using System.Data;
 using System.Data.SqlClient;
+using System.Globalization;
 using System.IO;
 using System.Text;
 using ServiceStack.Text;
@@ -134,7 +135,7 @@ public override string  GetQuotedValue(object value, Type fieldType)
 			    if (_ensureUtc && dateValue.Kind == DateTimeKind.Local)
 			        dateValue = dateValue.ToUniversalTime(); 
 				const string iso8601Format = "yyyyMMdd HH:mm:ss.fff";
-				return base.GetQuotedValue(dateValue.ToString(iso8601Format), typeof(string));
+				return base.GetQuotedValue(dateValue.ToString(iso8601Format,CultureInfo.InvariantCulture) , typeof(string));
 			}
 			if (fieldType == typeof(bool))
 			{
@@ -253,4 +254,4 @@ public override string GetDropForeignKeyConstraints(ModelDefinition modelDef)
             return sb.ToString();
         }
     }
-}
+}