File: System\Drawing\Gdiplus.cs
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Project: src\src\System.Drawing.Common\src\System.Drawing.Common.csproj (System.Drawing.Common)
// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
 
namespace System.Drawing;
 
internal static partial class Gdip
{
    [ThreadStatic]
    private static IDictionary<object, object>? t_threadData;
 
    internal static bool Initialized => GdiPlusInitialization.IsInitialized;
 
    /// <summary>
    ///  This property will give us back a dictionary we can use to store all of our static brushes and pens on
    ///  a per-thread basis. This way we can avoid 'object in use' crashes when different threads are
    ///  referencing the same drawing object.
    /// </summary>
    internal static IDictionary<object, object> ThreadData => t_threadData ??= new Dictionary<object, object>();
 
    internal static void CheckStatus(Status status) => status.ThrowIfFailed();
 
    internal static Exception StatusException(Status status) => status.GetException();
}