.NET Framework 4.0 DLL or code for a random password generation

[IT_Researcher]

I want a .NET Framework 4 DLL for a random password generator that satisfies these requirements:
a) A minimum length of 7 characters,
b) At least one special character,
c) At least one alphabetic character,
d) At least one numeric character (0-9)
I specifically want it to work for .net framework 4.0 or 4.5.

[PlausiblyDamp]

No idea how good it is but a quick google search turned up https://github.com/prjseal/PasswordGenerator/

[IT_Researcher]

No idea how good it is but a quick google search turned up https://github.com/prjseal/PasswordGenerator/

Tested , did not work for .NET framework 4.0.

[PlausiblyDamp]

From the description it should work, did it give any errors? How did you install it? If nothing else works it would probably take less than 5 minutes to compile a version that works on .Net 4 - even if that isn't possible then perhaps one of the older versions of the library can be used on .Net 4.5 instead.

Then again 4.5 went out of official support over 2 years ago so it might be worth upgrading to 4.8 anyway (or at least 4.6.2) - especially as it should be a fairly trivial upgrade to the newer framework versions anyway.

[IT_Researcher]

What are the possible methods to downgrade a DLL project from .NET Standard 2.0 to .NET Framework 4.0 in Visual Studio?

[PlausiblyDamp]

Have you tried opening the project properties and setting the framework version to 4.0? If not that is probably the best first step.

[sapator]

How is 2.0 to 4.0 downgrade?
Also using a GUID is probably a good way to go depending on what you have to do.

[PlausiblyDamp]

How is 2.0 to 4.0 downgrade?
Also using a GUID is probably a good way to go depending on what you have to do.

4.0 is the framework version. Standard 2.0 is a compatability version introduced around framework 4.5.

I am assuming that the question related to source compatability with framework 4.0, although there are older versions available that are compatible (as I mentioned in a previous post). Not sure a GUID of have any impact on compatibility.

[dbasnett]

I want a .NET Framework 4 DLL for a random password generator that satisfies these requirements:
a) A minimum length of 7 characters,
b) At least one special character,
c) At least one alphabetic character,
d) At least one numeric character (0-9)
I specifically want it to work for .net framework 4.0 or 4.5.

This should work for most versions of .Net

    Public Class RandoPassword
        Private Shared PRNG As New Random
        Private Shared alpha As String = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
        Private Shared nums As String = "0123456789"
        Private Shared spec As String = "{|}~!#$%&()*+-./:;<=>?@[\]^_`"
        Private Shared allchars As String = alpha & nums & spec
        ''' <summary>
        ''' generate a random password
        ''' </summary>
        ''' <param name="passLen">password length</param>
        ''' <param name="numAlpha">minimum number of alpha chars</param>
        ''' <param name="numSpecial">minimum number of special chars</param>
        ''' <param name="numNumeric">minimum number of numeric chars</param>
        ''' <returns>password as string</returns>
        ''' <remarks></remarks>
        Public Shared Function Generate(Optional passLen As Integer = 7,
                                         Optional numAlpha As Integer = 1,
                                         Optional numSpecial As Integer = 1,
                                         Optional numNumeric As Integer = 1) As String

            Dim rv As New List(Of Char)
            Dim CharsToGenerate As Integer = passLen
            If numSpecial + numNumeric + numAlpha > CharsToGenerate Then
                'todo override minLen???
                CharsToGenerate = numSpecial + numNumeric + numAlpha
            End If
            For ct As Integer = 1 To numAlpha 'add the alphas
                rv.Add(alpha(PRNG.Next(alpha.Length)))
            Next
            For ct As Integer = 1 To numSpecial 'add the specials
                rv.Add(spec(PRNG.Next(spec.Length)))
            Next
            For ct As Integer = 1 To numNumeric 'add the numeric
                rv.Add(nums(PRNG.Next(nums.Length)))
            Next
            Do While rv.Count < CharsToGenerate 'add the rest
                rv.Add(allchars(PRNG.Next(allchars.Length)))
            Loop
            rv = rv.OrderBy(Function(c) PRNG.Next).ToList 'sort
            Return String.Concat(rv) 'return
        End Function
    End Class