转换泛型列表或string[]数组为数据表

我有下面的函数

public static DataTable ToTable<T>(this IEnumerable<T> listItem)
{
            //Return null if the list is empty
            if (listItem == null || listItem.Count() == 0) return null;
            //Gets the type of the object
            var listType = listItem.First().GetType();
            //Initialize a new datatable
            var dataTable = new DataTable(listType.Name);
            //Create the datatable column names and types
            listType.GetProperties().ToList().ForEach(col => dataTable.Columns.Add(col.Name, col.PropertyType));
            //Get the datatable column names
            var dataTableColumnNames = dataTable.GetDatatableColumnNames();
            listItem.ToList().ForEach(item =>
            {
                //create a new datarow
                var dataRow = dataTable.NewRow();
                dataTableColumnNames
                .Where(propName => listType.GetProperty(propName) != null)
                .ToList()
                .ForEach(columnName => 
//Exception happens here in the next line
     dataRow[columnName] = listType.GetProperty(columnName).GetValue(item, null));     
                //Add the row to the data table
                dataTable.Rows.Add(dataRow);
            });
            //Commit the changes to the datatable
            dataTable.AcceptChanges();
            return dataTable;
        }

它适用于字典对象和通用列表作为List<MyClass> ..但不是List<string>或string[] .

对于那些我得到一个异常作为参数计数不匹配。

错误出现在

dataRow[columnName] = listType.GetProperty(columnName).GetValue(item, null));

发生的错误是什么?

请帮