First create solution

Nuvolar.WIN.Company/PostgreSQL.vb

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+Imports DevExpress.Xpo.DB
+Imports DevExpress.Xpo.DB.Helpers
+Imports DevExpress.Data.Filtering
+Imports System.Globalization
+
+
+Public Class PostgreSqlConnectionProviderEx
+    Inherits PostgreSqlConnectionProvider
+    Public Shadows Const XpoProviderTypeString As String = "PostgresEx"
+
+    Public Shared Shadows Function GetConnectionString(ByVal server As String, ByVal userid As String, ByVal password As String, ByVal database As String) As String
+        Return String.Format("{4}={5};Server={0};User Id={1};Password={2};Database={3};Encoding=UNICODE;", server,
+        userid, password, database, DataStoreBase.XpoProviderTypeParameterName, XpoProviderTypeString)
+    End Function
+
+    Public Shared Shadows Function GetConnectionString(ByVal server As String, ByVal port As Integer, ByVal userid As String, ByVal password As String, ByVal database As String) As String
+        Return String.Format("{5}={6};Server={0};User Id={1};Password={2};Database={3};Encoding=UNICODE;Port={4}", _
+        server, userid, password, database, port, DataStoreBase.XpoProviderTypeParameterName, _
+        XpoProviderTypeString)
+    End Function
+
+    Public Shared Shadows Sub Register()
+    End Sub
+
+    Shared Sub New()
+        RegisterDataStoreProvider(XpoProviderTypeString, New DataStoreCreationFromStringDelegate(AddressOf CreateProviderFromString))
+    End Sub
+
+    Public Shared Shadows Function CreateProviderFromString(ByVal connectionString As String, ByVal autoCreateOption As AutoCreateOption, _
+                                                            <System.Runtime.InteropServices.Out()> ByRef objectsToDisposeOnDisconnect() As IDisposable) As IDataStore
+        Dim connection As IDbConnection = New Npgsql.NpgsqlConnection(connectionString)
+        objectsToDisposeOnDisconnect = New IDisposable() {connection}
+        Return CreateProviderFromConnection(connection, autoCreateOption)
+    End Function
+
+    Public Shared Shadows Function CreateProviderFromConnection(ByVal connection As IDbConnection,
+ByVal autoCreateOption As AutoCreateOption) As IDataStore
+        Return New PostgreSqlConnectionProviderEx(connection, autoCreateOption)
+    End Function
+
+    Public Sub New(ByVal connection As IDbConnection, ByVal autoCreateOption As AutoCreateOption)
+        MyBase.New(connection, autoCreateOption)
+    End Sub
+
+    Public Overrides Function FormatBinary(ByVal operatorType As BinaryOperatorType, ByVal leftOperand As String, ByVal rightOperand As String) As String
+        Select Case operatorType
+            Case BinaryOperatorType.Like
+                Return String.Format(CultureInfo.InvariantCulture, "{0} ilike {1}", leftOperand, rightOperand)
+            Case Else
+                Return MyBase.FormatBinary(operatorType, leftOperand, rightOperand)
+        End Select
+    End Function
+End Class