Use field keyword

Author: Youssef1313

src/Adapter/MSTest.TestAdapter/ObjectModel/TestMethod.cs

@@ -31,8 +31,6 @@ public sealed class TestMethod : ITestMethod
     public const int TotalHierarchyLevels = HierarchyConstants.Levels.TotalLevelCount;
 
     private readonly ReadOnlyCollection<string?> _hierarchy;
-    private string? _declaringClassFullName;
-    private string? _declaringAssemblyName;
 
 #pragma warning disable IDE0060 // Remove unused parameter - Public API :/
     public TestMethod(string name, string fullClassName, string assemblyName, bool isAsync)
@@ -86,12 +84,12 @@ internal TestMethod(string? managedTypeName, string? managedMethodName, string?[
     /// </summary>
     public string? DeclaringAssemblyName
     {
-        get => _declaringAssemblyName;
+        get => field;
 
         set
         {
             DebugEx.Assert(value != AssemblyName, "DeclaringAssemblyName should not be the same as AssemblyName.");
-            _declaringAssemblyName = value;
+            field = value;
         }
     }
 
@@ -103,12 +101,12 @@ public string? DeclaringAssemblyName
     /// </summary>
     public string? DeclaringClassFullName
     {
-        get => _declaringClassFullName;
+        get => field;
 
         set
         {
             DebugEx.Assert(value != FullClassName, "DeclaringClassFullName should not be the same as FullClassName.");
-            _declaringClassFullName = value;
+            field = value;
         }
     }