SQL/Windows/EnterMinCostForAgentWindow.xaml

<Window x:Class="mysql_connector2.Windows.EnterMinCostForAgentWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:mysql_connector2.Windows"
        mc:Ignorable="d"
        Title="EnterMinCostForAgentWindow" Height="450" Width="800">
    <Grid>
        <StackPanel
    Orientation="Vertical" Margin="0,50,0,0">
            <TextBox
        Name="CostTextBox"/>
            <Button 
        Content="Изменить" Click="Button_Click"/>
        </StackPanel>
    </Grid>
</Window>