Add CSharpCodeMatcher (#324)

* wip

* fix

* .

* windows-2019

* <Target Name="CheckIfShouldKillVBCSCompiler" />

* <!--https://github.com/aspnet/RoslynCodeDomProvider/issues/51-->

* AllowCSharpCodeMatcher

* CSharpCodeMatcher : IObjectMatcher

* TemplateForIsMatchWithDynamic

* RequestMessageBodyMatcher_GetMatchingScore_BodyAsJson_CSharpCodeMatcher

* fix

*  }

* Better Exception Handling

test/WireMock.Net.Tests/Matchers/CSharpCodeMatcherTests.cs

@@ -0,0 +1,92 @@
+using NFluent;
+using WireMock.Matchers;
+using Xunit;
+
+namespace WireMock.Net.Tests.Matchers
+{
+    public class CSharpCodeMatcherTests
+    {
+        [Fact]
+        public void CSharpCodeMatcher_For_String_SinglePattern_IsMatch_Positive()
+        {
+            // Assign
+            string input = "x";
+
+            // Act
+            var matcher = new CSharpCodeMatcher("return it == \"x\";");
+
+            // Assert
+            Check.That(matcher.IsMatch(input)).IsEqualTo(1.0d);
+        }
+
+        [Fact]
+        public void CSharpCodeMatcher_For_String_IsMatch_Negative()
+        {
+            // Assign
+            string input = "y";
+
+            // Act
+            var matcher = new CSharpCodeMatcher("return it == \"x\";");
+
+            // Assert
+            Check.That(matcher.IsMatch(input)).IsEqualTo(0.0d);
+        }
+
+        [Fact]
+        public void CSharpCodeMatcher_For_String_IsMatch_RejectOnMatch()
+        {
+            // Assign
+            string input = "x";
+
+            // Act
+            var matcher = new CSharpCodeMatcher(MatchBehaviour.RejectOnMatch, "return it == \"x\";");
+
+            // Assert
+            Check.That(matcher.IsMatch(input)).IsEqualTo(0.0d);
+        }
+
+        [Fact]
+        public void CSharpCodeMatcher_For_Object_IsMatch()
+        {
+            // Assign
+            var input = new
+            {
+                Id = 9,
+                Name = "Test"
+            };
+
+            // Act
+            var matcher = new CSharpCodeMatcher("return it.Id > 1 && it.Name == \"Test\";");
+            double match = matcher.IsMatch(input);
+
+            // Assert
+            Assert.Equal(1.0, match);
+        }
+
+        [Fact]
+        public void CSharpCodeMatcher_GetName()
+        {
+            // Assign
+            var matcher = new CSharpCodeMatcher("x");
+
+            // Act
+            string name = matcher.Name;
+
+            // Assert
+            Check.That(name).Equals("CSharpCodeMatcher");
+        }
+
+        [Fact]
+        public void CSharpCodeMatcher_GetPatterns()
+        {
+            // Assign
+            var matcher = new CSharpCodeMatcher("x");
+
+            // Act
+            string[] patterns = matcher.GetPatterns();
+
+            // Assert
+            Check.That(patterns).ContainsExactly("x");
+        }
+    }
+}