adding files

.gitignore

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+bin/
+.vs/

App.config

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+<?xml version="1.0" encoding="utf-8" ?>
+<configuration>
+    <startup> 
+        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5.2" />
+    </startup>
+</configuration>

App.xaml

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+<Application x:Class="SQLBuilder.App"
+             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:local="clr-namespace:SQLBuilder"
+             StartupUri="MainWindow.xaml">
+    <Application.Resources>
+
+    </Application.Resources>
+</Application>

App.xaml.cs

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+using System;
+using System.Collections.Generic;
+using System.Configuration;
+using System.Data;
+using System.Linq;
+using System.Threading.Tasks;
+using System.Windows;
+
+namespace SQLBuilder
+{
+    /// <summary>
+    /// Interaction logic for App.xaml
+    /// </summary>
+    public partial class App : Application
+    {
+    }
+}

MainWindow.xaml

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+<Window x:Class="SQLBuilder.MainWindow"
+        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:SQLBuilder"
+        mc:Ignorable="d"
+        Title="SQL Builder" Height="450" Width="800">
+    <Grid>
+        <TextBox x:Name="txt_querybox" HorizontalAlignment="Left" Height="327" Margin="309,51,0,0" TextWrapping="Wrap" Text="" VerticalAlignment="Top" Width="450" VerticalScrollBarVisibility="Visible"/>
+        <Label Content="SQL Query" HorizontalAlignment="Left" Margin="309,24,0,0" VerticalAlignment="Top"/>
+        <Label Content="MDF Location" HorizontalAlignment="Left" Margin="57,93,0,0" VerticalAlignment="Top"/>
+        <Label Content="LDF Location" HorizontalAlignment="Left" Margin="57,160,0,0" VerticalAlignment="Top"/>
+        <Label Content="File Prefix" HorizontalAlignment="Left" Margin="57,24,0,0" VerticalAlignment="Top"/>
+        <TextBox x:Name="txt_prefix" HorizontalAlignment="Left" Height="23" Margin="57,55,0,0" Text="" VerticalAlignment="Top" Width="120"/>
+        <TextBox x:Name="txt_mdfloc" HorizontalAlignment="Left" Height="23" Margin="57,124,0,0" Text="" VerticalAlignment="Top" Width="120" AutomationProperties.IsRequiredForForm="True"/>
+        <TextBox x:Name="txt_ldfloc" HorizontalAlignment="Left" Height="23" Margin="57,191,0,0" Text="" VerticalAlignment="Top" Width="120" AutomationProperties.IsRequiredForForm="True"/>
+        <Button Content="Browse..." HorizontalAlignment="Left" Margin="187,124,0,0" VerticalAlignment="Top" Width="87" Height="23" Click="ChooseFolder_mdf"/>
+        <Button Content="Browse..." HorizontalAlignment="Left" Margin="187,191,0,0" VerticalAlignment="Top" Width="87" Height="23" Click="ChooseFolder_ldf"/>
+        <Button Content="Submit" HorizontalAlignment="Left" Margin="44,351,0,0" VerticalAlignment="Top" Width="102" Height="27" Click="Submit_Click"/>
+        <Button Content="Export" HorizontalAlignment="Left" Margin="167,351,0,0" VerticalAlignment="Top" Width="102" Height="27" Click="Export_Query"/>
+
+
+    </Grid>
+</Window>

MainWindow.xaml.cs

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+using System;
+using System.Linq;
+using System.Windows;
+using System.Windows.Forms;
+using System.IO;
+
+
+namespace SQLBuilder
+{
+    /// <summary>
+    /// Interaction logic for MainWindow.xaml
+    /// </summary>
+    public partial class MainWindow : Window
+    {
+        public MainWindow()
+        {
+            InitializeComponent();
+        }
+
+        // Icon by www.flaticon.com/authors/smashicons
+
+        private void ChooseFolder_mdf(object sender, RoutedEventArgs e)
+        {
+            using (var folderDialog = new FolderBrowserDialog())
+            {
+                if (folderDialog.ShowDialog() == System.Windows.Forms.DialogResult.OK)
+                {
+                    txt_mdfloc.Text = folderDialog.SelectedPath;
+                    // folderDialog.SelectedPath -- your result
+                }
+            }
+        }
+
+        private void ChooseFolder_ldf(object sender, RoutedEventArgs e)
+        {
+            using (var folderDialog = new FolderBrowserDialog())
+            {
+                if (folderDialog.ShowDialog() == System.Windows.Forms.DialogResult.OK)
+                {
+                    txt_ldfloc.Text = folderDialog.SelectedPath;
+                    // folderDialog.SelectedPath -- your result
+                }
+            }
+        }
+
+        private void Submit_Click(object sender, RoutedEventArgs e)
+        {
+            // Process needed inputs
+            if (String.IsNullOrWhiteSpace(txt_mdfloc.Text))
+            {
+                System.Windows.Forms.MessageBox.Show("MDF file location cannot be blank.");
+                return;
+            }
+
+            if (String.IsNullOrWhiteSpace(txt_ldfloc.Text))
+            {
+                System.Windows.Forms.MessageBox.Show("LDF file location cannot be blank.");
+                return;
+            }
+
+            // Clear output box to allow for new content
+            txt_querybox.Text = "";
+
+            // create Tab character
+            char tab = '\u0009';
+
+            // Get all MDF files from the input field
+            string[] mdf_files;
+            mdf_files = Directory.GetFiles(txt_mdfloc.Text, $"*{txt_prefix.Text}*.mdf", SearchOption.TopDirectoryOnly);
+
+            // Get all LDF files from the input field
+            string[] ldf_files;
+            ldf_files = Directory.GetFiles(txt_ldfloc.Text, $"*{txt_prefix.Text}*.ldf", SearchOption.TopDirectoryOnly);
+
+            // Zip arrays together 
+            var filenames = mdf_files.Zip(ldf_files, (m, l) => new { MDF = m, LDF = l });
+
+            foreach (var filename in filenames)
+            {
+                // Parse base name of file for our database name
+                string DBName = System.IO.Path.GetFileNameWithoutExtension(filename.MDF);
+
+                // Update our text box by adding to the content
+                // Accessing MDF file path with file.MDF
+                // Accessing LDF file path with file.LDF
+                txt_querybox.Text += $@"CREATE DATABASE {DBName}{Environment.NewLine}"
+                    + $@"{tab}ON (FILENAME = '{filename.MDF}'),{Environment.NewLine}"
+                    + $@"{tab}(FILENAME = '{filename.LDF}'){Environment.NewLine}"
+                    + $@"{tab}FOR ATTACH;"
+                    + Environment.NewLine + Environment.NewLine;
+            }
+        }
+
+        private void Export_Query(object sender, RoutedEventArgs e)
+        {
+            string cwd = Directory.GetCurrentDirectory();
+            string filename = null;
+
+            if (String.IsNullOrEmpty(txt_prefix.Text))
+            {
+                filename = $@"{cwd}\MassAttach.sql";
+            }
+            else
+            {
+                filename = $@"{cwd}\{txt_prefix.Text}_MassAttach.sql";
+            }
+
+            try
+            {
+                File.WriteAllText(filename, txt_querybox.Text);
+                System.Windows.Forms.MessageBox.Show($@"File saved to {filename}");
+            }
+            catch (Exception ex)
+            {
+                System.Windows.Forms.MessageBox.Show($@"Problem saving to {filename}" + Environment.NewLine + ex);
+            }
+
+        }
+    }
+}

Properties/AssemblyInfo.cs

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+using System.Reflection;
+using System.Resources;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+using System.Windows;
+
+// General Information about an assembly is controlled through the following
+// set of attributes. Change these attribute values to modify the information
+// associated with an assembly.
+[assembly: AssemblyTitle("SQLBuilder")]
+[assembly: AssemblyDescription("Simple Mass Attach Script for SQL Database Files")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("Clayton Errington")]
+[assembly: AssemblyProduct("SQLBuilder")]
+[assembly: AssemblyCopyright("Copyright ©  2020")]
+[assembly: AssemblyTrademark("")]
+[assembly: AssemblyCulture("")]
+
+// Setting ComVisible to false makes the types in this assembly not visible
+// to COM components.  If you need to access a type in this assembly from
+// COM, set the ComVisible attribute to true on that type.
+[assembly: ComVisible(false)]
+
+//In order to begin building localizable applications, set
+//<UICulture>CultureYouAreCodingWith</UICulture> in your .csproj file
+//inside a <PropertyGroup>.  For example, if you are using US english
+//in your source files, set the <UICulture> to en-US.  Then uncomment
+//the NeutralResourceLanguage attribute below.  Update the "en-US" in
+//the line below to match the UICulture setting in the project file.
+
+//[assembly: NeutralResourcesLanguage("en-US", UltimateResourceFallbackLocation.Satellite)]
+
+
+[assembly: ThemeInfo(
+    ResourceDictionaryLocation.None, //where theme specific resource dictionaries are located
+                                     //(used if a resource is not found in the page,
+                                     // or application resource dictionaries)
+    ResourceDictionaryLocation.SourceAssembly //where the generic resource dictionary is located
+                                              //(used if a resource is not found in the page,
+                                              // app, or any theme specific resource dictionaries)
+)]
+
+
+// Version information for an assembly consists of the following four values:
+//
+//      Major Version
+//      Minor Version
+//      Build Number
+//      Revision
+//
+// You can specify all the values or you can default the Build and Revision Numbers
+// by using the '*' as shown below:
+// [assembly: AssemblyVersion("1.0.*")]
+[assembly: AssemblyVersion("1.0.0.0")]
+[assembly: AssemblyFileVersion("1.0.0.0")]