[API Proposal]: Obsolete `Assembly` property `IsFullyTrusted`

[elinor-fung]

Background and motivation

In .NET, IsFullyTrusted has no meaning and always returns true.

API Proposal

namespace System.Reflection;

public abstract class Assembly
{
+   [Obsolete("Assembly.IsFullyTrusted has been deprecated and is not supported.", DiagnosticId= /*SYSLIB...*/)]
    public bool IsFullyTrusted { get; }
}

API Usage

var assembly = Assembly.Load(...);
Console.WriteLine(assembly.IsFullyTrusted); // always true

Alternative Designs

No response

Risks

No response

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[ThomasGoulet73]

Would it make sense to also obsolete the properties IsSecurityTransparent, IsSecuritySafeCritical and IsSecurityCritical on the types MethodBase, FieldInfo and Type ? I believe they also have no meaning in .Net and always return constants.