Visual Basic - random number between 2 points (latitude & longitude)

First time poster, longtime reader. I'm hoping someone can help me figure this out as I'm simply perplexed on how to do this, and I know it should be easy. I'm trying to use Visual Basic (I'm using VB2019) to generate random GPS points between a set area.

I want to find random values between:

latstart 25.761606 and latend 26.676215 -- Latitude
lonstart -80.053995 and lonend-80.053995 -- Longitude

The trouble I'm running into is when I try sample codes for generating random numbers, it rounds my coordinates to whole numbers when what I want is for the whole number and decimal to generate random.

I've tried this simple code thus far with no success:

 Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
     Dim random As New Random
     Dim lonstart As Decimal = TextBox1.Text
     Dim lonend As Decimal = TextBox2.Text
     Dim latstart As Decimal = TextBox3.Text
     Dim latend As Decimal = TextBox4.Text

     Dim templon As Decimal
     Dim templat As Decimal


     templon = random.Next(lonstart, lonend)
     templat = random.Next(latend, latstart)

     Label1.Text = templon
     Label2.Text = templat

 End Sub

Could someone please take a look at this and help point me in the right direction? (pun intended or not - you can decide).

I'd like to thank anyone who offers up a helpful suggestion to this problem in advance.

Thank you,

Richard