CA1829 Use Length/Count property instead of Count() when available

eng/Common.globalconfig

@@ -292,7 +292,7 @@ dotnet_diagnostic.CA1827.severity = suggestion
 dotnet_diagnostic.CA1828.severity = warning
 
 # Use Length/Count property instead of Count() when available
-dotnet_diagnostic.CA1829.severity = suggestion
+dotnet_diagnostic.CA1829.severity = warning
 
 # Prefer strongly-typed Append and Insert method overloads on StringBuilder.
 dotnet_diagnostic.CA1830.severity = warning

src/Build.OM.UnitTests/Definition/Project_Tests.cs

@@ -2286,7 +2286,7 @@ public void RemoveSeveralItemsOfVariousTypes()
 
             project.RemoveItems(list);
 
-            project.Items.Count().ShouldBe(2);
+            project.Items.Count.ShouldBe(2);
         }
 
         /// <summary>
@@ -2306,7 +2306,7 @@ public void RemoveSeveralItemsExpandExpression()
             Project project = new Project(XmlReader.Create(new StringReader(projectOriginalContents)));
 
             project.RemoveItems(project.GetItems("j").Take(2));
-            project.Items.Count().ShouldBe(3);
+            project.Items.Count.ShouldBe(3);
 
             StringWriter writer = new EncodingStringWriter();
             project.Save(writer);

src/Build.UnitTests/BackEnd/IntrinsicTask_Tests.cs

@@ -2014,7 +2014,7 @@ public void RemoveWithMatchingMultipleMetadata()
             Lookup lookup = LookupHelpers.CreateEmptyLookup();
             ExecuteTask(task, lookup);
             ICollection<ProjectItemInstance> items = lookup.GetItems("I2");
-            items.Count().ShouldBe(3);
+            items.Count.ShouldBe(3);
             items.ElementAt(0).EvaluatedInclude.ShouldBe("a2");
             items.ElementAt(1).EvaluatedInclude.ShouldBe("c2");
             items.ElementAt(2).EvaluatedInclude.ShouldBe("d2");
@@ -3480,7 +3480,7 @@ public void PhoenixBatchingIssue()
             ProjectInstance instance = new ProjectInstance(xml);
             instance.Build();
 
-            Assert.Equal(2, instance.Items.Count());
+            Assert.Equal(2, instance.Items.Count);
             Assert.Equal("gen.obj", instance.GetItems("CppCompile").First().GetMetadataValue("ObjectFile"));
             Assert.Equal("def.obj", instance.GetItems("CppCompile").Last().GetMetadataValue("ObjectFile"));
         }

src/Build.UnitTests/BackEnd/SdkResolverService_Tests.cs

@@ -246,7 +246,7 @@ private void ValidateExpectedPropertiesAndItems(bool includePropertiesAndItems,
                 result.PropertiesToAdd.Count.ShouldBe(1);
                 result.PropertiesToAdd["PropertyFromSdkResolver"].ShouldBe("ValueFromSdkResolver");
 
-                result.ItemsToAdd.Count().ShouldBe(1);
+                result.ItemsToAdd.Count.ShouldBe(1);
                 result.ItemsToAdd.Keys.Single().ShouldBe("ItemNameFromSdkResolver");
                 result.ItemsToAdd.Values.Single().ItemSpec.ShouldBe("ItemValueFromSdkResolver");
                 var metadata = result.ItemsToAdd.Values.Single().Metadata;

src/Build.UnitTests/BackEnd/TaskBuilderTestTask.cs

@@ -552,8 +552,8 @@ public TaskPropertyInfo[] GetTaskParameters()
                     propertyInfos[i] = new TaskPropertyInfo(
                         infos[i].Name,
                         infos[i].PropertyType,
-                        infos[i].GetCustomAttributes(typeof(OutputAttribute), false).Count() > 0,
-                        infos[i].GetCustomAttributes(typeof(RequiredAttribute), false).Count() > 0);
+                        infos[i].GetCustomAttributes(typeof(OutputAttribute), false).Length > 0,
+                        infos[i].GetCustomAttributes(typeof(RequiredAttribute), false).Length > 0);
                 }
 
                 return propertyInfos;

src/Build.UnitTests/Evaluation/Evaluator_Tests.cs

@@ -1888,7 +1888,7 @@ public void AllEvaluatedItems()
 
                 Project project = new Project(XmlReader.Create(new StringReader(content)));
 
-                Assert.Equal(6, project.AllEvaluatedItems.Count());
+                Assert.Equal(6, project.AllEvaluatedItems.Count);
                 Assert.Equal("i1", project.AllEvaluatedItems.ElementAt(0).EvaluatedInclude);
                 Assert.Equal(String.Empty, project.AllEvaluatedItems.ElementAt(0).GetMetadataValue("m"));
                 Assert.Equal("j1", project.AllEvaluatedItems.ElementAt(1).EvaluatedInclude);
@@ -1904,12 +1904,12 @@ public void AllEvaluatedItems()
                 project.AddItem("i", "i7");
                 project.RemoveItem(project.AllEvaluatedItems.ElementAt(1));
 
-                Assert.Equal(6, project.AllEvaluatedItems.Count());
+                Assert.Equal(6, project.AllEvaluatedItems.Count);
 
                 project.MarkDirty();
                 project.ReevaluateIfNecessary();
 
-                Assert.Equal(7, project.AllEvaluatedItems.Count());
+                Assert.Equal(7, project.AllEvaluatedItems.Count);
             }
             finally
             {
@@ -2004,15 +2004,15 @@ public void AllEvaluatedPropertiesSetProperty()
 
             Project project = new Project(XmlReader.Create(new StringReader(content)));
 
-            int initial = project.AllEvaluatedProperties.Count();
+            int initial = project.AllEvaluatedProperties.Count;
 
             project.SetProperty("p", "1");
 
-            Assert.Equal(initial, project.AllEvaluatedProperties.Count());
+            Assert.Equal(initial, project.AllEvaluatedProperties.Count);
 
             project.ReevaluateIfNecessary();
 
-            Assert.Equal(initial + 1, project.AllEvaluatedProperties.Count());
+            Assert.Equal(initial + 1, project.AllEvaluatedProperties.Count);
         }
 
         /// <summary>
@@ -2040,13 +2040,13 @@ public void AllEvaluatedItemDefinitionMetadata()
 
             Project project = new Project(XmlReader.Create(new StringReader(content)));
 
-            Assert.Equal(4, project.AllEvaluatedItemDefinitionMetadata.Count());
+            Assert.Equal(4, project.AllEvaluatedItemDefinitionMetadata.Count);
 
             Assert.Equal("2", project.AllEvaluatedItemDefinitionMetadata.ElementAt(1).EvaluatedValue);
             Assert.Equal("1;2", project.AllEvaluatedItemDefinitionMetadata.ElementAt(3).EvaluatedValue);
 
             // Verify lists are cleared on reevaluation
-            Assert.Equal(4, project.AllEvaluatedItemDefinitionMetadata.Count());
+            Assert.Equal(4, project.AllEvaluatedItemDefinitionMetadata.Count);
         }
 
         /// <summary>

src/MSBuild/OutOfProcTaskAppDomainWrapperBase.cs

@@ -408,7 +408,7 @@ IDictionary<string, TaskParameter> taskParams
             foreach (PropertyInfo value in finalPropertyValues)
             {
                 // only record outputs
-                if (value.GetCustomAttributes(typeof(OutputAttribute), true).Count() > 0)
+                if (value.GetCustomAttributes(typeof(OutputAttribute), true).Length > 0)
                 {
                     try
                     {

src/Tasks.UnitTests/ResourceManagement_Tests.cs

@@ -25,7 +25,7 @@ public void SingleCoreRequest()
                 }", "<UseCores />");
 
             var filteredMessages = messages.Where(m => m.Message.StartsWith("Number of cores acquired: ")).ToArray();
-            filteredMessages.Count().ShouldBe(1);
+            filteredMessages.Length.ShouldBe(1);
             GetTrailingIntegerFromMessage(filteredMessages[0]).ShouldBeGreaterThan(0);
         }
 
@@ -40,7 +40,7 @@ public void SingleCoreRequestWithNoRelease()
                 }", "<UseCores /> <UseCores />");
 
             var filteredMessages = messages.Where(m => m.Message.StartsWith("Number of cores acquired: ")).ToArray();
-            filteredMessages.Count().ShouldBe(2);
+            filteredMessages.Length.ShouldBe(2);
 
             int grantedCores1 = GetTrailingIntegerFromMessage(filteredMessages[0]);
             int grantedCores2 = GetTrailingIntegerFromMessage(filteredMessages[1]);
@@ -67,7 +67,7 @@ public void SingleCoreRequestWithReacquire()
                 }", "<UseCores />");
 
             var filteredMessages = messages.Where(m => m.Message.StartsWith("Number of cores acquired: ")).ToArray();
-            filteredMessages.Count().ShouldBe(2);
+            filteredMessages.Length.ShouldBe(2);
 
             int grantedCores1 = GetTrailingIntegerFromMessage(filteredMessages[0]);
             int grantedCores2 = GetTrailingIntegerFromMessage(filteredMessages[1]);

src/Tasks.UnitTests/RoslynCodeTaskFactory_Tests.cs

@@ -87,7 +87,7 @@ public void RoslynCodeTaskFactory_ReuseCompilation()
 
             // with broken cache we get two Compiling messages
             // as we fail to reuse the first assembly
-            messages.Count().ShouldBe(1);
+            messages.Length.ShouldBe(1);
         }
 
         [Fact]

src/Utilities.UnitTests/ToolLocationHelper_Tests.cs

@@ -4204,7 +4204,7 @@ public void VerifyFindRootFolderWhereAllFilesExist()
             string testDirectoryRoot = Path.Combine(Path.GetTempPath(), "VerifyFindRootFolderWhereAllFilesExist");
             string[] rootDirectories = new string[] { Path.Combine(testDirectoryRoot, "Root1"), Path.Combine(testDirectoryRoot, "Root2") };
 
-            for(int i = 0; i < rootDirectories.Count(); i++)
+            for(int i = 0; i < rootDirectories.Length; i++)
             {
                 // create directory
                 string subdir = Path.Combine(rootDirectories[i], "Subdir");