Using the following method you can convert the List into DataTable

For example you have the following List:

     /// <summary>
    /// RealTimeSalesInput 
    /// </summary>
    public List<RealTimeSales> RealTimeSalesInput { get; set; }
    
    /// <summary>
    /// RealTimeSales
    /// </summary>
    public class RealTimeSales
    {
        public long StoreID { get; set; }

        public string StoreNumber { get; set; }

        public decimal Value { get; set; }
    }

Now you can call the following function to provide the DataTable from the given List.

System.Collections.Generic.List<RealTimeSales> sales = new List<RealTimeSales>(){
                new RealTimeSales() { StoreID = 100, StoreNumber = "A100", Value = 100 },
                 new RealTimeSales() { StoreID = 101, StoreNumber = "B100", Value = 101},
                new RealTimeSales() { StoreID = 102, StoreNumber = "C100", Value = 102 }
            };
System.Data.DataTable resultTable = ConvertToDataTableFromList(sales);

        /// <summary>
        /// Converts to data table from list.
        /// Author: Himasagar Kutikuppala.
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="data">The data.</param>
        /// <returns></returns>
        public DataTable ConvertToDataTableFromList<T>(IList<T> data) 
        {
            System.Data.DataTable table = new System.Data.DataTable();
            try
            {
                System.ComponentModel.PropertyDescriptorCollection props = 
                    System.ComponentModel.TypeDescriptor.GetProperties(typeof(T));

                for (int i = 0; i < props.Count; i++)
                {
                    System.ComponentModel.PropertyDescriptor prop = props[i];
                    table.Columns.Add(prop.Name, prop.PropertyType);
                }
                object[] values = new object[props.Count];
                foreach (T item in data)
                {
                    for (int i = 0; i < values.Length; i++)
                    {
                        values[i] = props[i].GetValue(item);
                    }
                    table.Rows.Add(values);
                }
            }
            catch (Exception ex)
            {
                //Exception Occured 
            }            
            return table;
        }