Dynamically create an array of Type in C#

Pass in System.String, System.Int32 instead of string and int.

"string" is just shorthand for System.String. Type.GetType will not accept shorthand notation for types.

The problem is that there are no uint and string types in .NET. Those are C# type aliases to the actual System.UInt32 and System.String types. So you should call your function like this:

MyFunction("System.UInt32, System.String, System.String, System.UInt32");

Use the full name for each type, including namespace. Like so:

class Program
{
    static void Main(string[] args)
    {
        var dataTypes = "System.UInt32, System.String, System.String, System.UInt32";

        //out or in parameters of your function.   
        char[] charSeparators = new char[] { ',', ' ' };
        string[] types = dataTypes.Split(charSeparators,
                            StringSplitOptions.RemoveEmptyEntries);

        // create a list of data types for each argument
        List<Type> listTypes = new List<Type>();
        foreach (string t in types)
        {
            listTypes.Add(Type.GetType(t));
        }
        // convert the list to an array
        Type[] paramTypes = listTypes.ToArray<Type>();
    }
}