Efficient way to validate data of DataTable

Question

I have following DataTable (dataTable)

**ColumnName**  :   **Data**  

IDS : System.String  

QTY : System.Int32  

DOS      System.DateTime  

and following dictionary

Dictionary<string,Type> dict=new Dictionary<string, Type>();

dict["ID"]=typeof(string);

dict["QTY"]=typeof(Int32);

dict["DOS"]=typeof(DateTime);

Using following method for validating data of dataTable

public void ValidateData(Dictionary<string, Type> dict, DataTable dataTable)

{

foreach (DataRow row in dataTable.Rows)

{

// validate data here

}

}

What is best/efficient way to validate data here.

Thanks.