I dont think you can do this, but just in case, I can but ask…
I write programs in VB 2010 which uses .Net Framework 4.0. However my school currently only has .Net Framework 3.1 (3.something, think its 1)
Is there anyway i can “downgrade” the needed .net framework, or even just select another .net version to use?
In your project file, just target .NET 3.5 instead of 4.0. Properties -> Application -> TargetFramework.
However, if you have used specific .NET 4 features these will obviously not work so you might have to make other changes.
UPDATE: Sorry about missing the VB.NET
Got Project Properties ->Compile -> Advanced Compile Options and it is on the bottom of the dialog.