Question

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Generic methods and multiple constraints

I need a generic function that has two type constraints, each inheriting from a different base class. I know how to do this with one type:

void foo<T>() where T : BaseClass

However, I don’t know how to do this with two types:

void foo<TOne, TTwo>() where TOne : BaseOne // and TTwo : BaseTwo ???

How do you do this? (using .NET 2)

Answer 1

void foo<TOne, TTwo>() 
   where TOne : BaseOne
   where TTwo : BaseTwo

More info here:
https://learn.microsoft.com/en-us/dotnet/csharp/programming-guide/generics/constraints-on-type-parameters#constraining-multiple-parameters