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src/Sdk/DTWebApi/WebApi/PackageVersion.cs

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+using System;
+using System.Globalization;
+using System.Runtime.Serialization;
+
+namespace GitHub.DistributedTask.WebApi
+{
+    [DataContract]
+    public class PackageVersion : IComparable<PackageVersion>, IEquatable<PackageVersion>
+    {
+        public PackageVersion()
+        {
+        }
+
+        public PackageVersion(String version)
+        {
+            Int32 major, minor, patch;
+            String semanticVersion;
+
+            VersionParser.ParseVersion(version, out major, out minor, out patch, out semanticVersion);
+            Major = major;
+            Minor = minor;
+            Patch = patch;
+        }
+
+        public static Boolean TryParse(String versionStr, out PackageVersion version)
+        {
+            version = null;
+
+            try
+            {
+                version = new PackageVersion(versionStr);
+                return true;
+            }
+            catch
+            {
+                return false;
+            }
+        }
+
+        private PackageVersion(PackageVersion versionToClone)
+        {
+            this.Major = versionToClone.Major;
+            this.Minor = versionToClone.Minor;
+            this.Patch = versionToClone.Patch;
+        }
+
+        [DataMember]
+        public Int32 Major
+        {
+            get;
+            set;
+        }
+
+        [DataMember]
+        public Int32 Minor
+        {
+            get;
+            set;
+        }
+
+        [DataMember]
+        public Int32 Patch
+        {
+            get;
+            set;
+        }
+
+        public PackageVersion Clone()
+        {
+            return new PackageVersion(this);
+        }
+
+        public static implicit operator String(PackageVersion version)
+        {
+            return version.ToString();
+        }
+
+        public override String ToString()
+        {
+            return String.Format(CultureInfo.InvariantCulture, "{0}.{1}.{2}", Major, Minor, Patch);
+        }
+
+        public override int GetHashCode()
+        {
+            return this.ToString().GetHashCode();
+        }
+
+        public Int32 CompareTo(PackageVersion other)
+        {
+            Int32 rc = Major.CompareTo(other.Major);
+            if (rc == 0)
+            {
+                rc = Minor.CompareTo(other.Minor);
+                if (rc == 0)
+                {
+                    rc = Patch.CompareTo(other.Patch);
+                }
+            }
+
+            return rc;
+        }
+
+        public Boolean Equals(PackageVersion other)
+        {
+            return this.CompareTo(other) == 0;
+        }
+    }
+}