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I am using MVC3, in that i have used entity framework, i have added .edmx file for database operation. I have to apply validation on properties, i have added [Requeired(message="field value is require)] attribute to the property in designer.cs but the problem is that when i refresh my .edmx file all validations are erased, so what should i do this for that?
Posted 26-Feb-13 23:28pm

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