C#拓展方法

/// <summary>
/// 拓展方法
/// </summary>
public static class Tools
{
/// <summary>
/// string to int
/// </summary>
/// <param name="t"></param>
/// <returns></returns>
public static int ToInt(this string t)
{
int id;
int.TryParse(t, out id);
return id;
}
/// <summary>
/// string to Double
/// </summary>
/// <param name="t"></param>
/// <returns></returns>
public static Double ToDouble(this string t)
{
Double id;
Double.TryParse(t, out id);
return id;
}

/// <summary>
/// object to Double
/// </summary>
/// <param name="t"></param>
/// <returns></returns>
public static Double ToDouble(this Object t)
{
Double id;
try
{
id = Convert.ToDouble(t);
}
catch (Exception)
{
id = 0;
}
return id;
}
/// <summary>
/// object to int32
/// </summary>
/// <param name="t"></param>
/// <returns></returns>
public static int ToInt32(this Object t)
{
int id;
try
{
id = Convert.ToInt32(t);
}
catch (Exception)
{
id = 0;
}
return id;
}
}