Help in C# for modifying website elements

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C#

VB

HTML

Hi,

I want to develop an application in c# or C++. when we run the application it change website elements

HTMLDoc.all.UserName.type = "text"

to

HTMLDoc.all.UserName.type = "Password"

and close.

What I have tried:

I try to change elements on Excel VBA with follow code

Dim MyBrowser As InternetExplorer
Sub Cigna()

Dim MyHTML_Element As IHTMLElement
Dim MyURL As String
On Error GoTo Err_Clear
MyURL = "https://cignaforhcp.cigna.com/web/public/guest/"
Set MyBrowser = New InternetExplorer
MyBrowser.Silent = True
MyBrowser.navigate MyURL
MyBrowser.Visible = True
Do
Loop Until MyBrowser.readyState = READYSTATE_COMPLETE
Set HTMLDoc = MyBrowser.document
HTMLDoc.all.UserName.type = "Password"
HTMLDoc.all.UserName.Value = "00000"
HTMLDoc.all.Password.Value = "00000"
For Each MyHTML_Element In HTMLDoc.getElementsByTagName("input")
If MyHTML_Element.Type = "submit" Then MyHTML_Element.Click: Exit For
Next
Err_Clear:
If Err <> 0 Then
Err.Clear
Resume Next
End If
End Sub

It is working but i dont know how can i make an application on C#.