SQL Server Process Id Lock Error

This is Error.I am getting while inserting the record to Database Save

Transaction (Process ID 78) was deadlocked on lock resources with another process and has been chosen as the deadlock victim. Rerun the transaction. Description: 开发者_开发知识库An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Can any one tell me why SQL is showing this kind of Error.

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This is being shown because someone else was locking the records in which you were trying to write with your transaction, and you were trying to lock records the other transaction was trying to write to.

http://blog.sqlauthority.com/2007/05/16/sql-server-fix-error-1205-transaction-process-id-was-deadlocked-on-resources-with-another-process-and-has-been-chosen-as-the-deadlock-victim-rerun-the-transaction/

There's a good explanation on that url.