The method 'Where' cannot follow the method 'Select' or is not supported

Question

Why am I getting:

The method \'Where\' cannot follow the method \'Select\' or is not supported. Try writing the query in terms of supported methods

Answer 1

Why don't you just move the where so it is before the projection? It will result in a single query being executed which filters and projects:

XrmServiceContext.CreateQuery().Where(p => p.FirstName == "John").Project().To().First();