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  • Brad Wickett 19 posts 79 karma points
    Mar 27, 2019 @ 13:53
    Brad Wickett
    0

    Lately the Preview function has been throwing the following error:

    enter image description here

    Description: An error occurred during the compilation of a resource required to service this request. Please review the following specific error details and modify your source code appropriately.

    Compiler Error Message: CS1703: An assembly with the same identity 'System.Runtime, Version=4.1.2.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' has already been imported. Try removing one of the duplicate references.

    Thanks,

    Brad

  • Brad Wickett 19 posts 79 karma points
    Apr 17, 2019 @ 14:22
    Brad Wickett
    0

    Anyone? Has anyone else seen this problem?

  • Dave de Moel 113 posts 511 karma points c-trib
    Apr 17, 2019 @ 15:25
    Dave de Moel
    0

    Last time I hit that error there were some caching issues going on on my development machine, deleting all bin and obj folders in the project resolved the issues for me. Also make sure System.Runtime is not referenced more that ones in any .config files in your solution and that you don't have duplicate namespace imports in any custom classes.

    I personally have not experienced any problems with the preview.

  • Brad Wickett 19 posts 79 karma points
    Apr 24, 2019 @ 14:33
    Brad Wickett
    0

    Thanks. The odd thing is the exact same Umbraco instance runs fine on my local box, but throws this error in preview on the server. There are no custom references in any of the .config file, as we are running a clean Umbraco instance.

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