Generic distinction

Question

I have two interfaces

public interface IEntity<TKey> {
}

and

public interface IEntity : IEntity<int> {
}

I know I can check if a type is IEntity by doing if ( entity is IEntity ) but how can I check if it's more generally an IEntity<TKey> object?

Also, how can i cast safely the generic entity to the interface type?

Answer 1

Look at the following example using reflection.

Type targetType = typeof(IEntity<>);
var entityType = entity.GetType();
if (entityType.IsGenericType 
    && targetType.IsAssignableFrom(entityType.GetGenericTypeDefinition())) {

}