Parameter count mismatch thrown when reflecting string
c#, reflection
Solution
`Chars` is an indexer in C# terminology - but a "property with index parameters" in .NET/CLR terminology... so you can only get the value by specifying arguments. So in this case, it's representing the indexer used here:
char c = text[3];
In a `Dictionary<TKey, TValue>` the indexer would be the way you'd get `dictionary[key]`.
If you only want "normal" properties, filter the list of properties by the ones where PropertyInfo.GetIndexParameters() returns an empty array.
Problem
I have a generic method that works for most of my custom types. Today I'm building up unit tests. The extension fails with a type `string`. string comes up with two public instance properties, `Length` and `Chars`. When I call `GetValue` it bombs out "parameter count mismatch". I don't have any need to allow a string. Can I add a constraint to my generic sufficient enough to solve the problem? Code snippet ``` public static DataTable ToDataTable<T>(this List<T> items){... //List<T> generally works...just found it failing out with string List<string> items = new List<string> { "cookie", "apple", "whatever" }; System.Reflection.PropertyInfo[] props = typeof(string).GetProperties(System.Reflection.BindingFlags.Public | System.Reflection.BindingFlags.Instance); foreach (var item in items) { var values = new object[props.Length]; for (var i = 0; i < props.Length; i++) { values[i] = props[i].GetValue(item, null); } } ```