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 protected static String ByteArrayToString(byte[] inArray)
{
    StringBuilder outString = new StringBuilder("");
    for (int i = 0; i < inArray.Length; i++)
    {
        outString.Append(inArray[i].ToString("X2"));
    }
    return outString.ToString();
}

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protected static String SHA1Encrypt(String phrase)
{
    UTF8Encoding encoder = new UTF8Encoding();
    SHA1CryptoServiceProvider sha1 = new SHA1CryptoServiceProvider();
    byte[] hashedDataBytes = sha1.ComputeHash(encoder.GetBytes(phrase));
    return ByteArrayToString(hashedDataBytes);
}

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string sqlInsert = "INSERT INTO users (name, surname) VALUES (:name, :surname) RETURNING id_user INTO :LASTID";

OracleParameter lastId = new OracleParameter(":LASTID", OracleDbType.Int32);
lastId.Direction = ParameterDirection.Output;          
...
cmdInsert.Parameters.Add(lastId);

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...

  <system.diagnostics>
    <sources>
      <source name="System.ServiceModel"
              switchValue="Information, ActivityTracing"
              propagateActivity="true">
        <listeners>
          <add name="traceListener"
              type="System.Diagnostics.XmlWriterTraceListener"

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<Style x:Key="btnCustom" TargetType="{x:Type Button}">
    <Setter Property="Height" Value="50"/>
    <Setter Property="Width" Value="80"/>
    <Setter Property="Margin" Value="5,2,0,5"/>
    <Style.Resources>
        <Style TargetType="Image">
            <Style.Triggers>
                <Trigger Property="IsEnabled" Value="False">
                    <Setter Property="Opacity" Value="0.5" />
                </Trigger>

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<Style TargetType="{x:Type DataGrid}">
        <Setter Property="Background" Value="#FFF" />
        <Setter Property="AlternationCount" Value="2" />
</Style>  

<Style TargetType="{x:Type DataGridRow}">
    <Style.Triggers>                 
        <Trigger Property="ItemsControl.AlternationIndex" Value="0">
            <Setter Property="Background" Value="#EFEFEF"></Setter>
        </Trigger>

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<ListBox.ItemContainerStyle>
    <Style TargetType="ListBoxItem">
        <Style.Triggers>
            <Trigger Property="IsSelected" Value="True" >                                    
                <Setter Property="Background" Value="Transparent" />
                <Setter Property="Foreground" Value="Black" />
            </Trigger>
        </Style.Triggers>
        <Style.Resources>
            <SolidColorBrush x:Key="{x:Static SystemColors.HighlightBrushKey}" Color="Transparent"/>

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NuGet installation
  PM> Install-Package System.Windows.Interactivity.WPF 
  Must be installed in Main project also!!!
  
xmlns:i="http://schemas.microsoft.com/expression/2010/interactivity"

<i:Interaction.Triggers>
    <i:EventTrigger EventName="MouseDoubleClick">
        <i:InvokeCommandAction Command="{Binding SetUserCommand}"/>
    </i:EventTrigger>

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<Style x:Key="NormalTextBox" TargetType="{x:Type TextBox}">
    <Style.Triggers>
        <DataTrigger Binding="{Binding IsFocused}" Value="True">
            <Setter Property="FocusManager.FocusedElement" 
                Value="{Binding RelativeSource={RelativeSource Self}}" />
        </DataTrigger>
    </Style.Triggers>
</Style>

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Dim conn As New OracleConnection(oradb)
conn.Open()

Dim cmd As New OracleCommand
cmd.Connection = conn

cmd.CommandText = "procedure1"
cmd.CommandType = CommandType.StoredProcedure
cmd.Parameters.Add("p1", OracleDbType.Varchar2).Value = "Test 123"
cmd.Parameters.Add("p2", OracleDbType.Date).Value = System.DateTime.Now