Add MsBuildArgument constructor supporting multiple values

src/BenchmarkDotNet/Jobs/Argument.cs

@@ -45,8 +45,34 @@ public MonoArgument(string value) : base(value)
     /// example: new MsBuildArgument("/p:MyCustomSetting=123")
     /// </summary>
     [PublicAPI]
+
+    /// <summary>
+    /// A specialized MSBuild argument that sets a property using a quoted, semicolon-separated list of values.
+    /// </summary>
+    public class MsBuildProperty : MsBuildArgument
+    {
+        public MsBuildProperty(string key, params string[] values)
+            : base($"/p:{key}=\"{string.Join(";", values)}")
+        {
+        }
+
+
+    }
     public class MsBuildArgument : Argument
     {
         public MsBuildArgument(string value) : base(value) { }
+
+        public MsBuildArgument(string key, params string[] values)
+            : base($"/p:{key}={EscapeAndJoin(values)}") { }
+
+        private static string EscapeAndJoin(string[] values)
+        {
+            return string.Join("%3b", values.Select(EscapeSpecialChars));
+        }
+
+        private static string EscapeSpecialChars(string input)
+        {
+            return input.Replace(";", "%3B");
+        }
     }
 }

tests/BenchmarkDotNet.IntegrationTests.ManualRunning/MsBuildArgumentTests.cs

@@ -24,6 +24,13 @@ public void ProcessIsBuiltWithCustomProperty(bool setCustomProperty)
             CanExecute<PropertyDefine>(config);
         }
 
+        [Fact]
+
+        public void MsBuildProperty_ShouldWrapMultipleValuesInQuotes()
+        {
+            var arg = new MsBuildProperty("DefineConstants", "FOO", "BAR");
+            Assert.Equal("/p:DefineConstants=\"FOO;BAR\"", arg.TextRepresentation);
+        }
         [Fact]
         public void MultipleProcessesAreBuiltWithCorrectProperties()
         {