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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
using System.Runtime;
using System.Runtime.CompilerServices;
namespace System
{
[FriendAccessAllowed]
internal static class CompatibilitySwitches
{
private static bool s_AreSwitchesSet;
#if FEATURE_CORECLR
private static bool s_useLatestBehaviorWhenTFMNotSpecified; // Which behavior to use when the TFM is not specified.
#endif //FEATURE_CORECLR
#if !FEATURE_CORECLR
private static bool s_isNetFx40TimeSpanLegacyFormatMode;
private static bool s_isNetFx40LegacySecurityPolicy;
private static bool s_isNetFx45LegacyManagedDeflateStream;
#endif //!FEATURE_CORECLR
public static bool IsCompatibilityBehaviorDefined
{
get
{
return s_AreSwitchesSet;
}
}
private static bool IsCompatibilitySwitchSet(string compatibilitySwitch)
{
bool? result = AppDomain.CurrentDomain.IsCompatibilitySwitchSet(compatibilitySwitch);
return (result.HasValue && result.Value);
}
internal static void InitializeSwitches()
{
#if FEATURE_CORECLR
s_useLatestBehaviorWhenTFMNotSpecified = IsCompatibilitySwitchSet("UseLatestBehaviorWhenTFMNotSpecified");
#endif //FEATURE_CORECLR
#if !FEATURE_CORECLR
s_isNetFx40TimeSpanLegacyFormatMode = IsCompatibilitySwitchSet("NetFx40_TimeSpanLegacyFormatMode");
s_isNetFx40LegacySecurityPolicy = IsCompatibilitySwitchSet("NetFx40_LegacySecurityPolicy");
s_isNetFx45LegacyManagedDeflateStream = IsCompatibilitySwitchSet("NetFx45_LegacyManagedDeflateStream");
#endif //FEATURE_CORECLR
s_AreSwitchesSet = true;
}
#if FEATURE_CORECLR
/// <summary>
/// This property returns whether to give the latest behavior when the TFM is missing
/// </summary>
internal static bool UseLatestBehaviorWhenTFMNotSpecified
{
get
{
return s_useLatestBehaviorWhenTFMNotSpecified;
}
}
#else //FEATURE_CORECLR
public static bool IsAppEarlierThanSilverlight4
{
get
{
return false;
}
}
public static bool IsAppEarlierThanWindowsPhone8
{
get
{
return false;
}
}
public static bool IsAppEarlierThanWindowsPhoneMango
{
get
{
return false;
}
}
#endif //FEATURE_CORECLR
public static bool IsNetFx40TimeSpanLegacyFormatMode
{
get
{
#if !FEATURE_CORECLR
return s_isNetFx40TimeSpanLegacyFormatMode;
#else
return false;
#endif //!FEATURE_CORECLR
}
}
public static bool IsNetFx40LegacySecurityPolicy
{
get
{
#if !FEATURE_CORECLR
return s_isNetFx40LegacySecurityPolicy;
#else
return false;
#endif //!FEATURE_CORECLR
}
}
public static bool IsNetFx45LegacyManagedDeflateStream
{
get
{
#if !FEATURE_CORECLR
return s_isNetFx45LegacyManagedDeflateStream;
#else
return false;
#endif //!FEATURE_CORECLR
}
}
}
}
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