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Name <membername> is not CLS-compliant

An assembly is marked as <CLSCompliant(True)> but exposes a member with a name that begins with an underscore (_).

A programming element can contain one or more underscores, but to be compliant with the Language Independence and Language-Independent Components (CLS), it must not begin with an underscore. See Declared Element Names (Visual Basic).

When you apply the CLSCompliantAttribute to a programming element, you set the attribute's isCompliant parameter to either True or False to indicate compliance or noncompliance. There is no default for this parameter, and you must supply a value.

If you do not apply the CLSCompliantAttribute to an element, it is considered to be noncompliant.

By default, this message is a warning. For information on hiding warnings or treating warnings as errors, see Configuring Warnings in Visual Basic.

Error ID: BC40031

To correct this error

  • If you have control over the source code, change the member name so that it does not begin with an underscore.

  • If you require that the member name remain unchanged, remove the CLSCompliantAttribute from its definition or mark it as <CLSCompliant(False)>. You can still mark the assembly as <CLSCompliant(True)>.

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