Activator.CreateInstance() works inside VSIDE but not externally

Question

I have a bunch of COM objects which all implement the same interface, and need to create one of them as chosen at runtime from a list of options. Since I know the CLSID for

Answer 1

Two suggestions.

Use [STAThread] attribute.

[STAThread]
static void Main(string[] args)
{...}

Try calling CoInitialize

[DllImport("ole32.dll")]
static extern int CoInitialize(IntPtr pvRes);
CoInitialize((System.IntPtr)null)