C# Equals Method Explained

In C#, the Equals method is used to compare if two objects are equal. This method is inherited from the Object class, so all C# objects have the Equals method.

When we use the Equals method on an object, we are actually comparing whether the references of two objects are the same. If the references of two objects are the same (pointing to the same memory address), then they are equal. However, if the references of two objects are different, even if their content is the same, the Equals method will return false.

If we want to compare the content of two objects for equality, we usually need to override the Equals method to compare the content of the objects. Additionally, we typically need to override the GetHashCode method to ensure that objects with equal content return the same hash code.

For example, we can rewrite the Equals method as follows:

public override bool Equals(object obj)
{
    if (obj == null || GetType() != obj.GetType())
    {
        return false;
    }

    // 比较对象的内容是否相等
    MyClass other = (MyClass)obj;
    return this.Property1 == other.Property1 && this.Property2 == other.Property2;
}

After rewriting the Equals method, we can determine if two objects are equal based on their content.