In this blog I described how to convert list objects to DataTable. There are several method to convert list objects to DataTable. In this blog I used List interface for conversion.
It is a generic method, it converts all types of list into DataTable. <T> defines the type of list.

In C#
Adding  namespace:

using System.ComponentModel;

Generic method:

private DataTable ConvertToDataTable<T>(IList<T> list)
{
    Type entityType = typeof(T);
    DataTable table = new DataTable();
	PropertyDescriptorCollection properties =
	   TypeDescriptor.GetProperties(entityType);
	
	foreach (PropertyDescriptor prop in properties)
		table.Columns.Add(prop.Name, Nullable.GetUnderlyingType(prop.PropertyType) ?? prop.PropertyType);
	foreach (T item in list)
	{
		DataRow row = table.NewRow();
		foreach (PropertyDescriptor prop in properties)
			row[prop.Name] = prop.GetValue(item) ?? DBNull.Value;
		table.Rows.Add(row);
	}
	return table;

}

In VB.NET:
Adding  namespace:

Imports System.ComponentModel

Generic method:

Private Function ConvertToDataTable(Of T)(list As IList(Of T)) As DataTable
	Dim entityType As Type = GetType(T)
	Dim table As New DataTable()
	Dim properties As PropertyDescriptorCollection = TypeDescriptor.GetProperties(entityType)

	For Each prop As PropertyDescriptor In properties
		table.Columns.Add(prop.Name, If(Nullable.GetUnderlyingType(prop.PropertyType), prop.PropertyType))
	Next
	For Each item As T In list
		Dim row As DataRow = table.NewRow()
		For Each prop As PropertyDescriptor In properties
			row(prop.Name) = If(prop.GetValue(item), DBNull.Value)
		Next
		table.Rows.Add(row)
	Next
	Return table

End Function

Hope this code will help you. Thanks