class Base
{
    public virtual IntPtr[] Fun() => null;
}

// This is obvious pseude-code because C# won't let us introduce methods differing
// in return type. C# also requires to be explicit about "virtual" and "override".
// But IL... not so much.
class Derived : Base
{
    // overrides Base.Fun on 32bit platforms.
    public override uint[] Fun() => null;

    // overrides Base.Fun on 64bit platforms.
    public override ulong[] Fun() => null;
}

• Fadeout unused variable names (#1324, PR: #3733)
• Updated debugger (PR: #3729)
• Fixed not supported exception when trying to decompile a BCL assembly on Mono. For now we do not try to resolve implementation assembly from a ref assembly (PR: omnisharp-roslyn/#1767)
• Added support for generic classes in test runner (#3722, PR: omnisharp-roslyn/#1768)
• Improved autocompletion performance (PR: omnisharp-roslyn/#1761)
• Move to Roslyn's .editorconfig support (omnisharp-roslyn/#1657, PR: omnisharp-roslyn/#1771)
• Fully update CompilationOptions when project files change (PR: omnisharp-roslyn/#1774)

var mockHttp = new MockHttpMessageHandler();

// Setup a respond for the user api (including a wildcard in the URL)
mockHttp.When("http://localhost/api/user/*")
        .Respond("application/json", "{'name' : 'Test McGee'}"); // Respond with JSON

// Inject the handler or client into your application code
var client = mockHttp.ToHttpClient();

var response = await client.GetAsync("http://localhost/api/user/1234");
// or without async: var response = client.GetAsync("http://localhost/api/user/1234").Result;

var json = await response.Content.ReadAsStringAsync();

// No network connection required
Console.Write(json); // {'name' : 'Test McGee'}