C# - Get calling method's Assembly?

Try this

Assembly.GetCallingAssembly();

How about this:

StackTrace stackTrace = new StackTrace();           // get call stack

var assembly = stackTrace.GetFrame(0).GetMethod().DeclaringType.Assembly;

With help from http://www.csharp-examples.net/reflection-callstack/

This is what I use:

        var stackFrames = new StackTrace().GetFrames();
        if(stackFrames==null) return null;
        var executingAssembly = Assembly.GetExecutingAssembly();
        foreach (var frame in stackFrames)
        {
            var assembly = frame.GetMethod().DeclaringType.Assembly;
            if (assembly != executingAssembly)
            {
                return assembly;
            }
        }
        return null;