Object - IsDefault

A T extension method that query if 'source' is the default value.

Try it

public static void Main()
{
    int intDefault = 0;
    int intNotDefault = 1;

    // C# Extension Method: Object - IsDefault
    bool result1 = intDefault.IsDefault(); // return true;
    bool result2 = intNotDefault.IsDefault(); // return false;

    Console.WriteLine(result1);
    Console.WriteLine(result2);
}

View Source 
public static partial class Extensions
{
    /// <summary>
    ///     A T extension method that query if 'source' is the default value.
    /// </summary>
    /// <typeparam name="T">Generic type parameter.</typeparam>
    /// <param name="source">The source to act on.</param>
    /// <returns>true if default, false if not.</returns>
    public static bool IsDefault<T>(this T source)
    {
        return source.Equals(default(T));
    }
}