Version.CompareTo Method (Version)
Compares the current Version object to a specified Version object and returns an indication of their relative values.
Assembly: mscorlib (in mscorlib.dll)
Parameters
 value

Type:
System.Version
A Version object to compare to the current Version object, or null.
Return Value
Type: System.Int32A signed integer that indicates the relative values of the two objects, as shown in the following table.
Return value  Meaning 

Less than zero  The current Version object is a version before value. 
Zero  The current Version object is the same version as value. 
Greater than zero  The current Version object is a version subsequent to value. or value is null. 
Implements
IComparable<T>.CompareTo(T)This method implements the System.IComparable<T> interface, and performs slightly better than the CompareTo method because it does not have to unbox the value parameter.
The components of Version in decreasing order of importance are: major, minor, build, and revision. An unknown component is assumed to be older than any known component. For example:
Version 1.1 is older than version 1.1.0.
Version 1.1 is older than version 1.1.1.
Version 1.1 is older than version 1.1.2.3.
Version 1.1.2 is older than version 1.1.2.4.
Version 1.2.5 is newer than version 1.2.3.4.
The following code example demonstrates generic and nongeneric versions of the CompareTo method for several value and reference types.
// This example demonstrates the generic and nongeneric versions of the // CompareTo method for several base types. // The nongeneric version takes a parameter of type Object, while the generic // version takes a typespecific parameter, such as Boolean, Int32, or Double. using System; class Sample { public static void Main() { string nl = Environment.NewLine; string msg = "{0}The following is the result of using the generic and nongeneric{0}" + "versions of the CompareTo method for several base types:{0}"; DateTime now = DateTime.Now; // Time span = 11 days, 22 hours, 33 minutes, 44 seconds TimeSpan tsX = new TimeSpan(11, 22, 33, 44); // Version = 1.2.333.4 Version versX = new Version("1.2.333.4"); // Guid = CA761232ED4211CEBACD00AA0057B223 Guid guidX = new Guid("{CA761232ED4211CEBACD00AA0057B223}"); Boolean a1 = true, a2 = true; Byte b1 = 1, b2 = 1; Int16 c1 = 2, c2 = 2; Int32 d1 = 3, d2 = 3; Int64 e1 = 4, e2 = 4; Decimal f1 = 5.5m, f2 = 5.5m; Single g1 = 6.6f, g2 = 6.6f; Double h1 = 7.7d, h2 = 7.7d; Char i1 = 'A', i2 = 'A'; String j1 = "abc", j2 = "abc"; DateTime k1 = now, k2 = now; TimeSpan l1 = tsX, l2 = tsX; Version m1 = versX, m2 = new Version("2.0"); Guid n1 = guidX, n2 = guidX; // The following types are not CLScompliant. SByte w1 = 8, w2 = 8; UInt16 x1 = 9, x2 = 9; UInt32 y1 = 10, y2 = 10; UInt64 z1 = 11, z2 = 11; // Console.WriteLine(msg, nl); try { // The second and third Show method call parameters are automatically boxed because // the second and third Show method declaration arguments expect type Object. Show("Boolean: ", a1, a2, a1.CompareTo(a2), a1.CompareTo((Object)a2)); Show("Byte: ", b1, b2, b1.CompareTo(b2), b1.CompareTo((Object)b2)); Show("Int16: ", c1, c2, c1.CompareTo(c2), c1.CompareTo((Object)c2)); Show("Int32: ", d1, d2, d1.CompareTo(d2), d1.CompareTo((Object)d2)); Show("Int64: ", e1, e2, e1.CompareTo(e2), e1.CompareTo((Object)e2)); Show("Decimal: ", f1, f2, f1.CompareTo(f2), f1.CompareTo((Object)f2)); Show("Single: ", g1, g2, g1.CompareTo(g2), g1.CompareTo((Object)g2)); Show("Double: ", h1, h2, h1.CompareTo(h2), h1.CompareTo((Object)h2)); Show("Char: ", i1, i2, i1.CompareTo(i2), i1.CompareTo((Object)i2)); Show("String: ", j1, j2, j1.CompareTo(j2), j1.CompareTo((Object)j2)); Show("DateTime: ", k1, k2, k1.CompareTo(k2), k1.CompareTo((Object)k2)); Show("TimeSpan: ", l1, l2, l1.CompareTo(l2), l1.CompareTo((Object)l2)); Show("Version: ", m1, m2, m1.CompareTo(m2), m1.CompareTo((Object)m2)); Show("Guid: ", n1, n2, n1.CompareTo(n2), n1.CompareTo((Object)n2)); // Console.WriteLine("{0}The following types are not CLScompliant:", nl); Show("SByte: ", w1, w2, w1.CompareTo(w2), w1.CompareTo((Object)w2)); Show("UInt16: ", x1, x2, x1.CompareTo(x2), x1.CompareTo((Object)x2)); Show("UInt32: ", y1, y2, y1.CompareTo(y2), y1.CompareTo((Object)y2)); Show("UInt64: ", z1, z2, z1.CompareTo(z2), z1.CompareTo((Object)z2)); } catch (Exception e) { Console.WriteLine(e); } } public static void Show(string caption, Object var1, Object var2, int resultGeneric, int resultNonGeneric) { string relation; Console.Write(caption); if (resultGeneric == resultNonGeneric) { if (resultGeneric < 0) relation = "less than"; else if (resultGeneric > 0) relation = "greater than"; else relation = "equal to"; Console.WriteLine("{0} is {1} {2}", var1, relation, var2); } // The following condition will never occur because the generic and nongeneric // CompareTo methods are equivalent. else { Console.WriteLine("Generic CompareTo = {0}; nongeneric CompareTo = {1}", resultGeneric, resultNonGeneric); } } } /* This example produces the following results: The following is the result of using the generic and nongeneric versions of the CompareTo method for several base types: Boolean: True is equal to True Byte: 1 is equal to 1 Int16: 2 is less than 2 Int32: 3 is equal to 3 Int64: 4 is greater than 4 Decimal: 5.5 is less than 5.5 Single: 6.6 is equal to 6.6 Double: 7.7 is greater than 7.7 Char: A is equal to A String: abc is equal to abc DateTime: 12/1/2003 5:37:46 PM is equal to 12/1/2003 5:37:46 PM TimeSpan: 11.22:33:44 is equal to 11.22:33:44 Version: 1.2.333.4 is less than 2.0 Guid: ca761232ed4211cebacd00aa0057b223 is equal to ca761232ed4211cebacd00 aa0057b223 The following types are not CLScompliant: SByte: 8 is equal to 8 UInt16: 9 is equal to 9 UInt32: 10 is equal to 10 UInt64: 11 is equal to 11 */
Available since 8
.NET Framework
Available since 2.0
Portable Class Library
Supported in: portable .NET platforms
Silverlight
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1