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  • "Remove is an Invalid Operation" && Insertis an Invalid Operation

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    shahfaisal posted on Thu, Jan 22 2015 9:32 AM


    I have read on many posts about the error message that it is there because we try to write to a collection when it is in ReadOnly mode.

    In my case I am setting a property and after that using PropertyHasChanged(string item) method

    where the error comes.

    The class in which we have used the validation is inheritted from BusinessBAse.

    I would like to know where is the best place to set ReadOnlyP propert to False and 

    which method shoul I implement and if you can let me know how.

    I would appreciate,

    Thanks in advance.

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