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63 lines
3.1 KiB
C#
63 lines
3.1 KiB
C#
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// ==++==
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//
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// Copyright (c) Microsoft Corporation. All rights reserved.
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//
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// ==--==
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using System;
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namespace System
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{
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internal static partial class AppContextDefaultValues
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{
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internal static readonly string SwitchNoAsyncCurrentCulture = "Switch.System.Globalization.NoAsyncCurrentCulture";
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internal static readonly string SwitchThrowExceptionIfDisposedCancellationTokenSource = "Switch.System.Threading.ThrowExceptionIfDisposedCancellationTokenSource";
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internal static readonly string SwitchPreserveEventListnerObjectIdentity = "Switch.System.Diagnostics.EventSource.PreserveEventListnerObjectIdentity";
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// This is a partial method. Platforms can provide an implementation of it that will set override values
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// from whatever mechanism is available on that platform. If no implementation is provided, the compiler is going to remove the calls
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// to it from the code
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// We are going to have an implementation of this method for the Desktop platform that will read the overrides from app.config, registry and
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// the shim database. Additional implementation can be provided for other platforms.
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static partial void PopulateOverrideValuesPartial();
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static partial void PopulateDefaultValuesPartial(string platformIdentifier, string profile, int version)
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{
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// When defining a new switch you should add it to the last known version.
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// For instance, if you are adding a switch in .NET 4.6 (the release after 4.5.2) you should defined your switch
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// like this:
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// if (version <= 40502) ...
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// This ensures that all previous versions of that platform (up-to 4.5.2) will get the old behavior by default
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// NOTE: When adding a default value for a switch please make sure that the default value is added to ALL of the existing platforms!
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// NOTE: When adding a new if statement for the version please ensure that ALL previous switches are enabled (ie. don't use else if)
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switch (platformIdentifier)
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{
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case ".NETCore":
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case ".NETFramework":
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{
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if (version <= 40502)
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{
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AppContext.DefineSwitchDefault(SwitchNoAsyncCurrentCulture, true);
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AppContext.DefineSwitchDefault(SwitchThrowExceptionIfDisposedCancellationTokenSource, true);
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}
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break;
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}
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case "WindowsPhone":
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case "WindowsPhoneApp":
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{
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if (version <= 80100)
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{
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AppContext.DefineSwitchDefault(SwitchNoAsyncCurrentCulture, true);
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AppContext.DefineSwitchDefault(SwitchThrowExceptionIfDisposedCancellationTokenSource, true);
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}
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break;
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}
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}
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// At this point we should read the overrides if any are defined
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PopulateOverrideValuesPartial();
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}
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}
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}
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