C# - Step 2 Making changes to AssemblyInfo.cs file
Open your assemblyinfo.cs file and change ComVisible to true
// Setting ComVisible to false makes the types in this assembly not visible
// to COM components. If you need to access a type in this assembly from
// COM, set the ComVisible attribute to true on that type.
// The following GUID is for the ID of the typelib if this project is exposed to COM