Use existing property over linq operator

src/EditorFeatures/CSharpTest/Interactive/NavigateTo/InteractiveNavigateToTests.cs

@@ -641,7 +641,7 @@ await TestAsync(testHost, composition, source, async w =>
 
             var items = await _aggregator.GetItemsAsync("GK");
 
-            Assert.Equal(expecteditems.Count(), items.Count());
+            Assert.Equal(expecteditems.Count, items.Count());
 
             VerifyNavigateToResultItems(expecteditems, items);
         });

src/EditorFeatures/CSharpTest/LineSeparators/LineSeparatorTests.cs

@@ -602,7 +602,7 @@ private static async Task AssertTagsOnBracesOrSemicolonsTokensAsync(string conte
         var spans = await lineSeparatorService.GetLineSeparatorsAsync(document, root.FullSpan, CancellationToken.None);
         var tokens = root.DescendantTokens().Where(t => t.Kind() is SyntaxKind.CloseBraceToken or SyntaxKind.SemicolonToken);
 
-        Assert.Equal(tokenIndices.Length, spans.Count());
+        Assert.Equal(tokenIndices.Length, spans.Length);
 
         var i = 0;
         foreach (var span in spans.OrderBy(t => t.Start))

src/EditorFeatures/CSharpTest/NavigateTo/NavigateToTests.cs

@@ -1030,7 +1030,7 @@ await TestAsync(testHost, composition, source, async w =>
 
             var items = await _aggregator.GetItemsAsync("GK");
 
-            Assert.Equal(expecteditems.Count(), items.Count());
+            Assert.Equal(expecteditems.Count, items.Count());
 
             VerifyNavigateToResultItems(expecteditems, items);
         });

src/EditorFeatures/DiagnosticsTestUtilities/Diagnostics/AbstractUserDiagnosticTest_GenerateTypeDialog.cs

@@ -94,7 +94,7 @@ internal async Task TestWithMockedGenerateTypeDialog(
             Assert.False(fixActions.IsDefault);
 
             // Since the dialog option is always fed as the last CodeAction
-            var index = fixActions.Count() - 1;
+            var index = fixActions.Length - 1;
             var action = fixActions.ElementAt(index);
 
             Assert.Equal(action.Title, FeaturesResources.Generate_new_type);

src/EditorFeatures/Test/Tagging/TagSpanIntervalTreeTests.cs

@@ -84,10 +84,10 @@ public void TestManySpansWithEdit()
         buffer.Insert(0, new string('c', 100));
 
         // We should have 50 spans if we start looking at just the end
-        Assert.Equal(50, GetIntersectingSpans(tree, new SnapshotSpan(buffer.CurrentSnapshot, 150, 50)).Count());
+        Assert.Equal(50, GetIntersectingSpans(tree, new SnapshotSpan(buffer.CurrentSnapshot, 150, 50)).Count);
 
         // And we should have 26 here. We directly cover 25 spans, and we touch one more
-        Assert.Equal(26, GetIntersectingSpans(tree, new SnapshotSpan(buffer.CurrentSnapshot, 175, 25)).Count());
+        Assert.Equal(26, GetIntersectingSpans(tree, new SnapshotSpan(buffer.CurrentSnapshot, 175, 25)).Count);
     }
 
     [Fact]
@@ -98,11 +98,11 @@ public void TestManySpansWithEdit2()
         buffer.Insert(0, new string('c', 100));
 
         // We should see one span anywhere in the beginning of the buffer, since this is edge inclusive
-        Assert.Equal(1, GetIntersectingSpans(tree, new SnapshotSpan(buffer.CurrentSnapshot, 0, 1)).Count());
-        Assert.Equal(1, GetIntersectingSpans(tree, new SnapshotSpan(buffer.CurrentSnapshot, 50, 1)).Count());
+        Assert.Equal(1, GetIntersectingSpans(tree, new SnapshotSpan(buffer.CurrentSnapshot, 0, 1)).Count);
+        Assert.Equal(1, GetIntersectingSpans(tree, new SnapshotSpan(buffer.CurrentSnapshot, 50, 1)).Count);
 
         // We should see two at position 100 (the first span that is now expanded, and the second of width 1)
-        Assert.Equal(2, GetIntersectingSpans(tree, new SnapshotSpan(buffer.CurrentSnapshot, 100, 1)).Count());
+        Assert.Equal(2, GetIntersectingSpans(tree, new SnapshotSpan(buffer.CurrentSnapshot, 100, 1)).Count);
     }
 
     [Fact]
@@ -116,7 +116,7 @@ public void TestManySpansWithDeleteAndEditAtStart()
 
         // We should see 51 spans intersecting the start. When we did the delete, we contracted 50 spans to size
         // zero, and then the insert will have expanded all of those, plus the span right next to it.
-        Assert.Equal(51, GetIntersectingSpans(tree, new SnapshotSpan(buffer.CurrentSnapshot, 0, 1)).Count());
+        Assert.Equal(51, GetIntersectingSpans(tree, new SnapshotSpan(buffer.CurrentSnapshot, 0, 1)).Count);
     }
 
     [Fact]
@@ -130,7 +130,7 @@ public void TestManySpansWithDeleteAndEditAtEnd()
 
         // We should see 51 spans intersecting the end. When we did the delete, we contracted 50 spans to size zero,
         // and then the insert will have expanded all of those, plus the span right next to it.
-        Assert.Equal(51, GetIntersectingSpans(tree, new SnapshotSpan(buffer.CurrentSnapshot, 99, 1)).Count());
+        Assert.Equal(51, GetIntersectingSpans(tree, new SnapshotSpan(buffer.CurrentSnapshot, 99, 1)).Count);
     }
 
     [Fact]

src/EditorFeatures/Test2/CodeFixes/CodeFixServiceTests.vb

@@ -70,15 +70,15 @@ Namespace Microsoft.CodeAnalysis.Editor.Implementation.CodeFixes.UnitTests
                 Dim diagnostics = Await diagnosticService.GetDiagnosticsForSpanAsync(document,
                     range:=(Await document.GetSyntaxRootAsync()).FullSpan, CancellationToken.None)
 
-                Assert.Equal(1, diagnostics.Count())
+                Assert.Equal(1, diagnostics.Length)
 
                 ' Verify available codefix with a global fixer
                 Dim fixes = Await codefixService.GetFixesAsync(
                     document,
                     (Await document.GetSyntaxRootAsync()).FullSpan,
                     CancellationToken.None)
 
-                Assert.Equal(0, fixes.Count())
+                Assert.Equal(0, fixes.Length)
 
                 ' Verify available codefix with a global fixer + a project fixer
                 ' We will use this assembly as a project fixer provider.
@@ -92,7 +92,7 @@ Namespace Microsoft.CodeAnalysis.Editor.Implementation.CodeFixes.UnitTests
                     document,
                     (Await document.GetSyntaxRootAsync()).FullSpan,
                     CancellationToken.None)
-                Assert.Equal(1, fixes.Count())
+                Assert.Equal(1, fixes.Length)
 
                 ' Remove a project analyzer
                 project = project.RemoveAnalyzerReference(projectAnalyzerReference)
@@ -102,7 +102,7 @@ Namespace Microsoft.CodeAnalysis.Editor.Implementation.CodeFixes.UnitTests
                     (Await document.GetSyntaxRootAsync()).FullSpan,
                     CancellationToken.None)
 
-                Assert.Equal(0, fixes.Count())
+                Assert.Equal(0, fixes.Length)
             End Using
         End Function
 
@@ -142,15 +142,15 @@ Namespace Microsoft.CodeAnalysis.Editor.Implementation.CodeFixes.UnitTests
                 Dim diagnostics = Await diagnosticService.GetDiagnosticsForSpanAsync(document,
                     range:=(Await document.GetSyntaxRootAsync()).FullSpan, CancellationToken.None)
 
-                Assert.Equal(1, diagnostics.Count())
+                Assert.Equal(1, diagnostics.Length)
 
                 ' Verify no codefix with a global fixer
                 Dim fixes = Await codefixService.GetFixesAsync(
                     document,
                     (Await document.GetSyntaxRootAsync()).FullSpan,
                     CancellationToken.None)
 
-                Assert.Equal(0, fixes.Count())
+                Assert.Equal(0, fixes.Length)
 
                 ' Verify no codefix with a global fixer + a project fixer
                 ' We will use this assembly as a project fixer provider.
@@ -165,7 +165,7 @@ Namespace Microsoft.CodeAnalysis.Editor.Implementation.CodeFixes.UnitTests
                     (Await document.GetSyntaxRootAsync()).FullSpan,
                     CancellationToken.None)
 
-                Assert.Equal(0, fixes.Count())
+                Assert.Equal(0, fixes.Length)
             End Using
         End Function