How do I get the current username in .NET using C#?

Question

How do I get the current username in .NET using C#?

Answer 1

In case it's helpful to others, when I upgraded an app from c#.net 3.5 app to Visual Studio 2017 this line of code User.Identity.Name.Substring(4); threw this error "startIndex cannot be larger than length of string" (it didn't baulk before).

It was happy when I changed it to System.Security.Principal.WindowsIdentity.GetCurrent().Name however I ended up using Environment.UserName; to get the logged in Windows user and without the domain portion.

Answer 2

Just in case someone is looking for user Display Name as opposed to User Name, like me.

Here's the treat :

System.DirectoryServices.AccountManagement.UserPrincipal.Current.DisplayName

Add Reference to System.DirectoryServices.AccountManagement in your project.

Answer 3

String myUserName = Environment.UserName

This will give you output - your_user_name

Answer 4

Get the current Windows username:

using System;

class Sample
{
    public static void Main()
    {
        Console.WriteLine();

        //  <-- Keep this information secure! -->
        Console.WriteLine("UserName: {0}", Environment.UserName);
    }
}

Answer 5

Try the property: Environment.UserName.

Answer 6

You may also want to try using:

Environment.UserName;

Like this...:

string j = "Your WindowsXP Account Name is: " + Environment.UserName;

Hope this has been helpful.