[repo] Replace some fields with auto properties (open-telemetry#6104)

Co-authored-by: Mikel Blanchard <[email protected]>

Author: SimonCropp

src/OpenTelemetry.Exporter.Prometheus.HttpListener/Internal/PrometheusExporter.cs

@@ -14,8 +14,6 @@ namespace OpenTelemetry.Exporter.Prometheus;
 [ExportModes(ExportModes.Pull)]
 internal sealed class PrometheusExporter : BaseExporter<Metric>, IPullMetricExporter
 {
-    private Func<int, bool>? funcCollect;
-    private ExportFunc? funcExport;
     private Resource? resource;
     private bool disposed;
 
@@ -38,17 +36,9 @@ public PrometheusExporter(PrometheusExporterOptions options)
     /// <summary>
     /// Gets or sets the Collect delegate.
     /// </summary>
-    public Func<int, bool>? Collect
-    {
-        get => this.funcCollect;
-        set => this.funcCollect = value;
-    }
+    public Func<int, bool>? Collect { get; set; }
 
-    internal ExportFunc? OnExport
-    {
-        get => this.funcExport;
-        set => this.funcExport = value;
-    }
+    internal ExportFunc? OnExport { get; set; }
 
     internal Action? OnDispose { get; set; }
 

src/OpenTelemetry/Metrics/ExportModesAttribute.cs

@@ -9,19 +9,17 @@ namespace OpenTelemetry.Metrics;
 [AttributeUsage(AttributeTargets.Class, AllowMultiple = false, Inherited = true)]
 public sealed class ExportModesAttribute : Attribute
 {
-    private readonly ExportModes supportedExportModes;
-
     /// <summary>
     /// Initializes a new instance of the <see cref="ExportModesAttribute"/> class.
     /// </summary>
     /// <param name="supported"><see cref="ExportModes"/>.</param>
     public ExportModesAttribute(ExportModes supported)
     {
-        this.supportedExportModes = supported;
+        this.Supported = supported;
     }
 
     /// <summary>
     /// Gets the supported <see cref="ExportModes"/>.
     /// </summary>
-    public ExportModes Supported => this.supportedExportModes;
+    public ExportModes Supported { get; }
 }

src/OpenTelemetry/ReadOnlyFilteredTagCollection.cs

@@ -22,7 +22,6 @@ public readonly struct ReadOnlyFilteredTagCollection
     private readonly HashSet<string>? excludedKeys;
 #endif
     private readonly KeyValuePair<string, object?>[] tags;
-    private readonly int count;
 
     internal ReadOnlyFilteredTagCollection(
 #if NET
@@ -38,7 +37,7 @@ internal ReadOnlyFilteredTagCollection(
 
         this.excludedKeys = excludedKeys;
         this.tags = tags;
-        this.count = count;
+        this.MaximumCount = count;
     }
 
     /// <summary>
@@ -48,7 +47,7 @@ internal ReadOnlyFilteredTagCollection(
     /// Note: Enumerating the collection may return fewer results depending on
     /// the filter.
     /// </remarks>
-    internal int MaximumCount => this.count;
+    internal int MaximumCount { get; }
 
     /// <summary>
     /// Returns an enumerator that iterates through the tags.