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using System;
public delegate B Test<A,B> (A a);
public class Foo<T>
{
T t;
public Foo (T t)
{
this.t = t;
}
public U Method<U> (Test<T,U> test)
{
return test (t);
}
}
class X
{
public static void Main ()
{
Test<double,int> test = new Test<double,int> (Math.Sign);
Foo<double> foo = new Foo<double> (Math.PI);
Console.WriteLine (foo.Method<int> (test));
string s = foo.Method<string> (delegate (double d) { return "s" + d; });
Console.WriteLine (s);
}
}
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