C#：如何将“大小”与新项目进行比较

int a = 10;
int b = 5;

if (a > b)
{
    Console.WriteLine("a大于b");
}
else if (a < b)
{
    Console.WriteLine("a小于b");
}
else
{
    Console.WriteLine("a等于b");
}

string str1 = "abc";
string str2 = "def";

int result = str1.CompareTo(str2);

if (result > 0)
{
    Console.WriteLine("str1大于str2");
}
else if (result < 0)
{
    Console.WriteLine("str1小于str2");
}
else
{
    Console.WriteLine("str1等于str2");
}

class Project : IComparable<Project>
{
    public string Name { get; set; }
    public int Size { get; set; }

    public int CompareTo(Project other)
    {
        return Size.CompareTo(other.Size);
    }
}

Project project1 = new Project { Name = "项目1", Size = 100 };
Project project2 = new Project { Name = "项目2", Size = 200 };

int result = project1.CompareTo(project2);

if (result > 0)
{
    Console.WriteLine("项目1大于项目2");
}
else if (result < 0)
{
    Console.WriteLine("项目1小于项目2");
}
else
{
    Console.WriteLine("项目1等于项目2");
}