Question: VB.net coding standard regarding declaring variable

print("dim _Foo as string");

Private Dim m_Foo As String

Private Dim _Foo As String

Dim Foo As String

Dim l_Foo As String

Public Class Bar
    Private m_firstName As String

    Public Sub New(ByVal firstName As String)
        m_firstName = firstName
    End Sub

    Public Function SayGreeting() As String
        Dim l_Greeting As String
        l_Greeting = String.Format("{0}, {1}!", "Hello", m_firstName)
        Return l_Greeting
    End Function
End Class

_member //Class member - Camel Case
intLocalVariable //note use of Hungarian notation - Camel Case
pMethodParameter //Camel Case
MyProperty //Pascal Case