How can I convert ExceptionThrown_V1.ExceptionFlags to a valid C# Enum?-CodePudding

Following the .NET documentation on the .NET runtime exception events, I am trying to map the ExceptionFlags whose value is UInt16 to an Enum:

[Flags]
public enum ExceptionFlags : UInt16
{
    HasInnerException = 0x01,
    IsNestedException = 0x02,
    IsRethrownException = 0x04,
    IsCorruptedException = 0x08,
    IsCLSComplaint = 0x10
}

But the values that are coming from the event fall outside the values in the doc. For example I am getting 17 and sometimes 16.

What is the logic to map those values into the flags on the enum?

CodePudding user response：

Values preceded by 0x are hexadecimal literals. The equivalent using decimal literals would be:

[Flags]
public enum ExceptionFlags : UInt16
{
    HasInnerException = 1,
    IsNestedException = 2,
    IsRethrownException = 4,
    IsCorruptedException = 8,
    IsCLSComplaint = 16
}

As is typical for an enum marked [Flags], each predefined value is a power of 2. They can be combined together with the bitwise OR | to produce values not listed. See this answer for more details.

Your examples:

Decimal 16 = Hexadecimal 0x10 = Binary 0001 0000 = IsCLSComplaint. This indicates that the exception is CLS compliant, but it doesn't have an inner exception, and it's not a nested, rethrown, or corrupted exception.
Decimal 17 = Hexadecimal 0x11 = Binary 0001 0001 = IsCLSCompliant | HasInnerException. This indicates that the exception is CLS compliant and it has an inner exception, but it's not a nested, rethrown, or corrupted exception.