What Is VB.NET?

VB.NET is a modern, object-oriented programming language developed by Microsoft as part of the .NET platform. It evolved from classic Visual Basic 6 but was rewritten from the ground up to support full object-oriented programming, exception handling with Try/Catch, and compilation to the Common Intermediate Language (CIL) that runs on the .NET runtime (CLR). Unlike VB6, VB.NET code compiles down to the same intermediate language as C# and F#, meaning it shares the same base class library, garbage collector, and JIT compiler as every other .NET language.

VB.NET was introduced alongside the .NET Framework 1.0 in 2002 as Microsoft's answer to bringing Visual Basic's approachable syntax into a fully managed, object-oriented world. Because it targets the Common Language Runtime just like C#, a VB.NET project can reference a C# library and vice versa without any friction, since both compile to the same CIL bytecode and share assemblies like System.Collections.Generic.

Today VB.NET is most common in enterprise line-of-business applications, Windows Forms desktop tools, and legacy systems maintained by companies that migrated from VB6 rather than rewriting in C#. Many finance, insurance, and manufacturing companies still maintain large VB.NET codebases because rewriting a decade of tested business logic in another language is costly, and .NET's backward compatibility means those Windows Forms apps still run on modern .NET 8.

The biggest practical difference between VB.NET and C# is syntax, not capability: VB.NET uses English-like keywords such as End If, End Sub, and Then instead of curly braces and semicolons, and it is case-insensitive, so Dim x and Dim X refer to the same variable. Both languages compile to identical CIL and can use the same .NET libraries, LINQ, async/await, and generics, so the choice between them is largely a matter of team preference and existing codebase.