jflam

static object InvokeInstanceMethod(object thisParameter, string methodName, Type[] typeArguments, params object[] args) {
    CSharpArgumentInfo[] parameterFlags = new CSharpArgumentInfo[args.Length + 1];
    Expression[] parameters = new Expression[args.Length + 1];
    var thisParameterFlags = CSharpArgumentInfo.Create(CSharpArgumentInfoFlags.None, null);
    parameterFlags[0] = thisParameterFlags;
    parameters[0] = Expression.Constant(thisParameter);
    for (int i = 0; i < args.Length; i++) {
        parameterFlags[i + 1] = CSharpArgumentInfo.Create(CSharpArgumentInfoFlags.Constant | CSharpArgumentInfoFlags.UseCompileTimeType, null);
        parameters[i + 1] = Expression.Constant(args[i]);
    }