| .cpk |
DTM Test Log File |
| .cdxml |
ChemDraw XML File |
| .cmp |
Windows Connection Manager Profile |
| .cpf |
Cognos Project File |
| .cat |
Windows Catalog File |
| .ccgame |
XNA Creators Club Game Package |
| .cov |
Fax Cover Page File |
| .cpe |
Fax Cover Page File |
| .cch |
.NET Security Resolution Cache File |
| .ckp |
SQL Server Checkpoint File |
| .csx |
Visual C# Script |
| .ctx |
Visual Basic Control Binary File |
| .cdf-ms |
ClickOnce Compiled Manifest File |
| .cfb |
Compound Binary File |
| .cag |
ClipArt Gallery Package |
| .cht |
Emulator Cheat File |
| .cdmp |
WCS Device Model Profile |
| .ci |
Windows Content Indexer Catalog File |
| .cms |
Connection Manager Service Profile |
| .chg |
Quicken Online Data File |
| .ctc |
Visual Studio Command Table Configuration File |
| .cto |
Visual Studio Binary Command Table Output File |
| .ctsym |
Visual Studio Command Table Output File |
| .customdestinations-ms |
Windows 7 Jump List File |