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► KB ► To/From Guides ► VB Classic

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File Extensions (VB Classic and C# Cross Reference Guide)

By Mike Prestwood

VB Classic versus C#: A side by side comparison between VB Classic and C#.

Tool Basics

Developer environment basics such as common file extensions, common keyboard shortcuts, etc.

File Extensions

[Other Languages]

Languages Focus

Common or primary file extensions used (not a complete list, just the basics).

VB Classic:

.BAS = VB source code file.
.CLS = VB class file (one class per file).

More Info / Comment

C#:

Common source code file extensions include:

.SLN - Solution File. Contains solution specific information such as links to the projects within this solution.
.CSPROJ - C# Project File. Contains project specific information. When you add a file containing one or more classes, it is added to this file.
.CS - C# source file.
.Designer.CS - C# form file (a text resource file).

Syntax Example:

//Sample code snippet from the .csproj project file:

<ItemGroup>
  <Compile Include="Cyborg.cs" />
  <Compile Include="Cyborg600.cs" />
  <Compile Include="Form1.cs">
    <SubType>Form</SubType>
  </Compile>

  //...