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Home/ Questions/Q 6741625
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Editorial Team
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Editorial Team
Asked: May 26, 20262026-05-26T11:44:47+00:00 2026-05-26T11:44:47+00:00

this is my problem with VS :S in the first project : System.Security.Cryptography.AesCryptoServiceProvider obj;

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this is my problem with VS :S
in the first project :
System.Security.Cryptography.AesCryptoServiceProvider obj;
everything is ok
in the second project:
System.Security.Cryptography.AesCryptoServiceProvider obj1;
it doesn’t recognize the AesCryptoServiceProvider?!!

is VS using different packages or what ?!

updated: changed the variable name but still not working

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  1. Editorial Team
    Editorial Team
    2026-05-26T11:44:48+00:00Added an answer on May 26, 2026 at 11:44 am

    Check if both projects are referencing System.Core. Probably only the first one has it. You’ve to add it on both to be able to use AesCryptoServiceProvider.

    Moreover, as you can see here AesCryptoServiceProvider is only available since .NET 3.5. Check your project’s properties, in particular the Target Framework.

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