This code is the searches for solid sphere, surface area and volume area but it is not working

Question

'declaration
Dim radius As double
Dim surfacearea As Double
Dim volume As Double

'get user input
radius = Convert.ToDouble(txtRadius.Text)

'calculation
surfaceArea=4.0*Pi *Math.pow(radius.2.0)
volume=4.0/3.0*Pi* Math.pow(radius.3.0)

'output
lblSurfaceArea.Text = Convert.ToString(surfaceArea)
lblVolume.Text =Convert.ToString(volume)

Answer 1

The question is tagged for C# but the language is VB.Net. Are you trying to make it compile as C#?