Passing System.Data.Linq.Table <T> to a generic function

Question

I am trying to create a generic function that accepts System.Data.Linq.Table<T> .

General function

  public int Get<T>(MyDataContext db, System.Data.Linq.Table<T> table, string PropertyValue) where T: IMatchable { T prop = table.FirstOrDefault<T>(p => p.Name.ToLower() == PropertyValue.ToLower()); if (prop != null) { return prop.ID; } } 

Interface so that I can access the ID property

 public interface IMatchable { int ID { get; set; } } 

My mistake

Type "T" must be a reference type in order to use it as the "TEntity" parameter in the generic type or the 'System.Data.Linq.Table' method

I'm not sure what I'm doing wrong.

Answer 1

Try specifying where T: class, IMatchable

Since System.Data.Linq.Table has a restriction where TEntity : class you need to make sure that T also a reference type.