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C# Multiple generic constraints

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I was wondering if it is possible to add multiple generic constraints?

I have an Add method that takes an Object (Either Email, Phone or Address), so i was thinking something like:

public void Add<T>(T Obj)      where T : Address     where T : Email     where T : Phone {     if (Obj is Address)         m_Address.Add(Obj as Address);     else if (Obj is Email)         m_Email.Add(Obj as Email);     else         m_Phone.Add(Obj as Phone); } 

But I keep getting:

"A constraint clause has already been specified for type parameter 'T'. All of the constraints for a type parameter must be specified in a single where clause."

like image 997
Patrick Avatar asked Jul 24 '09 10:07

Patrick


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1 Answers

You can't do that. Why not just have three methods and let the compiler do the hard work for you?

public void Add(Address address) { m_Address.Add(address); } public void Add(Email email) { m_Email.Add(email); } public void Add(Phone phone) { m_Phone.Add(phone); } 
like image 167
Greg Beech Avatar answered Oct 07 '22 01:10

Greg Beech