Automapper causing error: missing type map configuration or unsupported mapping

Question

I am new to Automapper. I have added Nuget package - Automapper into my Manager (BLL) and DAL layer. Now, below is related stuff: Below is the statment of Manager library that giving me exception: ``` this.dataRepository.Update(Mapper.Map(studentDTO)); ``` Exception is as follow: Missing type map configuration or unsupported mapping. Mapping types: studentDTO -> StudentMaster Admin.App.DTO.studentDTO-> Admin.App.DAL.StudentMaster In case of select/where query on EF, it is working and able to map using ``` .Project().To() ``` I wrote an `Autoconfiguration.cs` file as follows: ``` public static class AutoMapperConfiguration { public static void Configure() { ConfigureStudentMasterMaps(); } private static void ConfigureStudentMasterMaps() { Mapper.CreateMap(); } } ``` Note: Both the entity - `StudentMaster` (model) entity and `StudentDTO` have the same properties. Please guide me how I could resolve this issue. Thank You

Accepted Answer

See Getting-started https://github.com/AutoMapper/AutoMapper/wiki/Getting-started ``` CreateMap<**TSource, TDestination**>() ``` You must add ``` Mapper.CreateMap(); ``` After mapping configuration call ``` Mapper.AssertConfigurationIsValid(); ```

Automapper causing error: missing type map configuration or unsupported mapping

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