A definitive guide to API-breaking changes in .NET

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Changing a method signature

Kind: Binary-level Break

Languages affected: C# (VB and F# most likely, but untested)

API before change

public static class Foo
{
    public static void bar(int i);
}

API after change

public static class Foo
{
    public static bool bar(int i);
}

Sample client code working before change

Foo.bar(13);

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