using System;

using System.Collections.Generic;

using System.Linq;

using System.Reflection;

using System.Runtime.InteropServices;

using System.Text;

namespace XAPI

{

[CLSCompliant(true)]

[ComVisible(false)]

public static class Helper

{

public static void SetValueForValueType<T>(this FieldInfo field, ref T item, object value) where T : struct

{

field.SetValueDirect(__makeref(item), value);

}

public static object ChangeType(object value, Type type)

{

if (value == null && type.IsGenericType) return Activator.CreateInstance(type);

if (value == null) return null;

if (type == value.GetType()) return value;

if (type.IsEnum)

{

if (value is string)

return Enum.Parse(type, value as string);

else

return Enum.ToObject(type, value);

}

if (!type.IsInterface && type.IsGenericType)

{

Type innerType = type.GetGenericArguments()[0];

object innerValue = ChangeType(value, innerType);

return Activator.CreateInstance(type, new object[] { innerValue });

}

if (value is string && type == typeof(Guid)) return new Guid(value as string);

if (value is string && type == typeof(Version)) return new Version(value as string);

if (!(value is IConvertible)) return value;

return Convert.ChangeType(value, type);

}

}

}