asp.net - Where to write exceptions -

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i making web application, first application.
want know when there not matching catch block exception generated , don't want display exception generated, instead want display message or want forward other link or page, should write message or how should display this? please elaborate me on this.

i think want customerrors property in web.config file. looks this:

    <customerrors mode="remoteonly" defaultredirect="error.aspx">         <error statuscode="403" redirect="403.htm"/>         <error statuscode="404" redirect="404.htm"/>     </customerrors>

this let redirect own error pages thrown exceptions, error 403's, , error 404's.


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