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A value that reflects the sort order of the current instance as compared to obj. The following table defines the conditions under which the returned value is a negative number, zero, or a positive number.
Returned Value Description A negative value The current instance is < obj. Zero The current instance is == obj. A positive value The current instance is > than obj.
For any objects A, B and C, the following are required to be true:
A.CompareTo(A) is required to return zero.
If A.CompareTo(B) returns zero then B.CompareTo(A) is required to return zero.
If A.CompareTo(B) is zero, then B.CompareTo(C) and A.CompareTo(C) must have the same sign (negative, zero or positive).
If B.CompareTo(C) is zero, then A.CompareTo(B) and A.CompareTo(C) must have the same sign (negative, zero or positive).
If A.CompareTo(B) returns zero and B.CompareTo(C) returns zero then A.CompareTo(C) is required to return zero.
If A.CompareTo(B) returns a value other than zero then B.CompareTo(A) is required to return a value of the opposite sign.
If A.CompareTo(B) returns a value other not equal to zero, and B.CompareTo(C) returns a value y of the same sign as other, then A.CompareTo(C) is required to a value of the same sign as other and y .
The exact behavior of this method is unspecified. The intent of this method is to provide a mechanism that orders instances of a class in a manner that is consistent with the mathematical definitions of the relational operators (<, >, and ==), without regard for class-specific definitions of the operators.