C# Get Application Version via runtime

Setting Custom version number at project properties under application assembly information

Get application version via runtime code:

System.Reflection.Assembly.GetExecutingAssembly().GetName().Version.ToString();

C# Read Registry Method

To get value from registry. Sample code:

 
//include this
//for registry read write
using Microsoft.Win32; 

public string ReadRegistryValue(string KeyName)
{
            
    // Opening the registry key
    RegistryKey key = Registry.LocalMachine;
    // Open a subKey as read-only
    RegistryKey subkey = key.OpenSubKey(@"SOFTWARE\SKYPE\PHONE");
            
    // If the RegistrySubKey doesn't exist -> (null)
    if (subkey == null)
    {
        return null;
    }
    else
    {
        try
        {
            //return value
            return (string)subkey.GetValue(KeyName);
        }
        catch (Exception e)
        {
            //display error
            MessageBox.Show("Reading registry Exception " + e.Message.ToString());
            return null;
        }
    }
}

//method usage
 MessageBox.Show(ReadRegistryValue("SkypePath"));

Additional Reading at :

1. MSDN RegistryKey

C# Create Delete Move Copy Rename Folder

Folder Manipulation (Create Delete Move Copy Rename Folder) in C# Sample Code:

 

//include this
using System.IO;

public void CreateFolder(string FolderPath)
{
    // Specify the directories you want to manipulate.
    DirectoryInfo di = new DirectoryInfo(FolderPath);
    try
    {
        //check folder already exists.
        if (di.Exists)
        {
            MessageBox.Show("Folder already exists.");

        }
        else 
        {
            //create folder
            di.Create();
        }  
    }
    catch (Exception e)
    {
        MessageBox.Show(e.ToString());
    }
}

public void DeleteFolder(string FolderPath)
{
    // Specify the directories you want to manipulate.
    DirectoryInfo di = new DirectoryInfo(FolderPath);
    try
    {
        //check folder exists.
        if (di.Exists)
        {
            //delete all including sub folder
            di.Delete(true);
        }
    }
    catch (Exception e)
    {
        MessageBox.Show(e.ToString());
    }
}

public void CopyAll(DirectoryInfo source, DirectoryInfo target)
{
    if (source.FullName.ToLower() == target.FullName.ToLower())
    {
        return;
    }

    // check target folder exists 
    if (Directory.Exists(target.FullName) == false)
    {
        //create target target folder
        Directory.CreateDirectory(target.FullName);
    }

    //copy each file to target folder
    foreach (FileInfo fi in source.GetFiles())
    {
        fi.CopyTo(Path.Combine(target.ToString(), fi.Name), true);
    }

    //copy each sub folder to target folder
    foreach (DirectoryInfo diSourceSubDir in source.GetDirectories())
    {
        DirectoryInfo nextTargetSubDir = target.CreateSubdirectory(diSourceSubDir.Name);
        //copy all file from subfolder to target subfolder
        CopyAll(diSourceSubDir, nextTargetSubDir);
    }
}

public void MoveAll(DirectoryInfo source, DirectoryInfo target)
{
    try
    {
        //check source folder exist
        if(source.Exists)
            //check destination not exist
            if(!target.Exists)
                source.MoveTo(target.ToString());
    }
    catch (IOException e)
    {
        MessageBox.Show(e.Message);
    }
}

public void RenameTo(DirectoryInfo di, string NewName)
{
    if (di == null)
    {
        MessageBox.Show("Directory info to rename cannot be null");
    }

    if (string.IsNullOrWhiteSpace(NewName))
    {
        MessageBox.Show("New name cannot be null or blank");
    }

    di.MoveTo(Path.Combine(di.Parent.FullName, NewName));
}

//method usage
CreateFolder(@"C:\NewFolder");
DeleteFolder(@"C:\FolderToDelete");

DirectoryInfo Source = new DirectoryInfo(@"C:\SourceFolder");
DirectoryInfo Target = new DirectoryInfo(@"C:\TargetFolder");
CopyAll(Source, Target);
MoveAll(Source, Target);

RenameTo(Source, "NewName");

Additional Reading :

1. MSDN Directory Info
2. Move Folder Example
3. Renaming Folder Example

C# File in Directory List

To Get List of File in directory. Sample Code:

 
//include this
using System.IO;

//set directory to scan
var dirInfo = new DirectoryInfo(@"C:\FolderName");

//checking if folder exists
if (dirInfo.Exists) {
    //*.* = get all file name
    FileInfo[] files = dirInfo.GetFiles("*.*", SearchOption.TopDirectoryOnly);   

    foreach (FileInfo file in files) {
        //example to list the file name using messagebox
        MessageBox.Show(file.ToString());
    }
}

Additional Reading at :

1. MSDN DirectoryInfo
2. MSDN GetFiles

C# Debug.Writeline

Debug.WriteLine is equivalent to Debug.Print in VB. Sample Code:

 

//include this
using System.Diagnostics;

//example
String Text = "Text Something";
Debug.WriteLine(Text);