itoldyouso - a Funny Equivalent to chksym

The days are not filled with Crash Dump analysis with using WinDBG. Have you heard that it is possible to execute a command like itoldyouso in WinDBG? This is funny exported function in dbghelp.dll which is equivalent to chksym. i.e to check the validity of the module specified against the pdb pdb file. I dont know why redmond folks done like this.  For e.g If you want to verify the ntdll.dll PDB file.Let’s go hereGive command like “!itoldyouso ntdll.dll”See the results.ntdll.dll    Timestamp: 411096B4  SizeOfImage: B0000          pdb: ntdll.pdb      pdb sig: 36515FB5-D043-45E4-91F6-72FA2E2878C0          age: 2
Loaded pdb is C:\WebSymbols\ntdll.pdb\36515FB5D04345E491F672FA2E2878C02\ntdll.pdb
ntdll.pdb      pdb sig: 36515FB5-D043-45E4-91F6-72FA2E2878C0          age: 2
MATCH: ntdll.pdb and ntdll.dll  This is useful especially when you have many PDB files of same modules.  John Robbins Blogged about this few weeks ago. Follow the link to see more details.