Avoid static members in ComVisible types

TypeName	AvoidStaticMembersInComVisibleTypes
CheckId	CA1407
Category	Microsoft.Interoperability
Breaking Change	NonBreaking

Cause

A type that is specifically marked as visible to COM contains a public static method.

Rule Description

COM does not support static methods.

This rule ignores property and event accessors, operator overloading methods or methods marked with the System.Runtime.InteropServices.ComRegisterFunctionAttribute attribute or the System.Runtime.InteropServices.ComUnregisterFunctionAttribute attribute.

By default, the following are visible to COM: assemblies, public types, public instance members in public types, and all members of public value types.

How to Fix Violations

To fix a violation of this rule, change the design to use an instance method that provides the same functionality as the static method.

When to Exclude Warnings

It is safe to exclude a warning from this rule if a COM client does not need access to the functionality provided by the static method.

Related Rules

Mark assemblies with ComVisible

Avoid int64 arguments for VB6 clients

Avoid non-public fields in ComVisible value types

See Also

Other Resources

Interoperating with Unmanaged Code