Question

I have the following static field in my class

private static Func<IDataReader, Project> Make = reader =>
    new Project
    {
        Name = reader["ProjectName"].AsId(),
        StartDate = reader["StartDate"].AsDateTime(),
        EndDate = reader["EndDate"].AsDateTime()
    };

I’m trying to do the same using a generic interface, but can’t work out how to define the generic type. It would be something along the lines of this.

private static Func<IDataReader, IDefinition<T>> Make<T> = reader =>
    new Definition<T>
    {
        Name = reader["DefinitionName"].AsId()
    };

This obviousily doesn’t work, but does anyone know how I could achieve this?

Answer 1

You can’t have a generic field; you can, however, push this into a generic static type:

static class Foo<T> {
    internal static readonly Func<IDataReader, IDefinition<T>> Make = reader =>
        new Definition<T> {
            Name = reader["DefinitionName"].AsId()
        };
}

and use

Foo<YourType>.Make

You might want to tidy that up, though (the internal field, etc)