Fatal Execution Engine Error (7A0F3CD5) (800703e9)

Question

Hi All,
Below mentioned is the issues I'm facing when running my application.
1. .Net Run time version 2.0.50727.3603 - Fatal Execution Engine Error (7A0F3CD5) (800703e9)
2. Faulting application MyApplication.EXE, version 1.0.0.1 , stamp 4b3b6f3f, faulting modules mscorwks.dll, version 2.0.50727.3603, stamp 4a7cd88e, debug ? 0, fault address 0x00283cd5.
These are two errors i got in Application Event Viewer.
My application works on the following:
Need to write the Records(datas) in the file and update the status in 3 tables in SQL Server.
Iteration will goes on for minimun 10 Lakhs records.
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I got the above mentioned issues at nearly 70000 records and application get closed. But i cant able to catch the error in my application. I'm running my application in 2GB Ram. SQL server and application is in the same machine.

I couldn't exactly locate the issue...
Kinldy give me the valuable solutions and suggestions to resolve these issues.... Or any way to catch and handle these issues in my application itself...
Tnks in Advance........