C#: Reflection - Get Property Type, Switch on Type, Set Property Value

gistfile1.cs

public static void SetKey<T>(T obj, TempDataDictionary _tempData)
{
    System.Type type = typeof(T);

    // Get our Foreign Key that we want to maintain
    String foreignKey = _tempData["ForeignKey"].ToString();

    // If we do not have a Foreign Key, we do not need to set a property
    if (String.IsNullOrEmpty(foreignKey))
        return;

    // Get our the value that we need to set our Foreign Key to
    String value = _tempData[foreignKey].ToString();

    // Get our property via reflection so that we can invoke methods against property
    System.Reflection.PropertyInfo prop = type.GetProperty(foreignKey.ToString());

    // Gets what the data type is of our property (Foreign Key Property)
    System.Type propertyType = prop.PropertyType;

    // Get the type code so we can switch
    System.TypeCode typeCode = System.Type.GetTypeCode(propertyType);
    try
    {

        switch (typeCode)
        {
            case TypeCode.Int32:
                prop.SetValue(type, Convert.ToInt32(value), null);
                break;
            case TypeCode.Int64:
                prop.SetValue(type, Convert.ToInt64(value), null);
                break;
            case TypeCode.String:
                prop.SetValue(type, value, null);
                break;
            case TypeCode.Object:
                if (propertyType == typeof(Guid) || propertyType == typeof(Guid?))
                {
                    prop.SetValue(obj, Guid.Parse(value), null);
                    return;
                }
                break;
            default:
                prop.SetValue(type, value, null);
                break;
        }

        return;
    }
    catch (Exception ex)
    {
        throw new Exception("Failed to set property value for our Foreign Key");
    }



}