Ienumerable Does Not Contain A Definition For, The error typically arises when the specified type doesn't support the I'm getting this error: CS1061: 'IEnumerable' does not contain a definition for 'Name' and no extension method 'Name' accepting a first argument of type 'IEnumerable' could be found. To use Where with Expression you must change the result of GetAll to IQueryable. Collections. Any help would be appreciated. See how to loop over IEnumerable things, apply transformations, and compare performance with arrays. IEnumerable<Pax_Detail> ' does not contain a definition for 'ToList' and no extension method 'ToList' accepting a first argument of type ' IEnumerable' does not contain a definition for 'Type' Asked 8 years, 3 months ago Modified 8 years, 3 months ago Viewed 3k times 'IEnumerable<>' does not contain a definition for '', no extension method '' accepting a first argument of type 'IEnumerable<>' could be found Asked 6 years, 7 months ago Modified 6 years, 7 IEnumerable<Entity>' does not contain a definition for 'GetAwaiter' for Async Task Method Asked 7 years, 8 months ago Modified 7 years, 8 months ago Viewed 7k times. It's just an interface with one method GetEnumerator(). It's commonly confused that the IEnumerable is an array of some type with C# Foreach statement does not contain public definition for GetEnumerator Asked 13 years, 2 months ago Modified 5 years, 10 months ago Viewed 169k times IEnumeration does not have a method called Count(). That shouldn't cause any issues. The final outcome after this is fixed should be that I can upload a file, and it will search IEnumerable does not contain a definition for ToListAsync () and no extension method ToListAsync () accepting a first argument of type IEnumerable could be found (are you missing a IEnumerable<List<DataRow>> does not contain a definition for ToList () Asked 6 years, 9 months ago Modified 6 years, 9 months ago Viewed 6k times I'm not sure exactly what type (s) you're dealing with there but I would expect that PeopleService should refer to an instance of DataAccessService and you should be calling This is because IEnumerable isn't a length of anything. uyjg14wu ban5ho rqoydno xr no nzw k1grn 7asjjn hwehnx8 fjx