Simplify tutorials

OpenTelemetry.sln

@@ -212,11 +212,7 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "OpenTelemetry.Instrumentati
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "OpenTelemetry.Instrumentation.AspNet.TelemetryHttpModule.Tests", "test\OpenTelemetry.Instrumentation.AspNet.TelemetryHttpModule.Tests\OpenTelemetry.Instrumentation.AspNet.TelemetryHttpModule.Tests.csproj", "{4D7201BC-7124-4401-AD65-FAB58A053D45}"
 EndProject
-Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "getting-started-histogram", "docs\metrics\getting-started-histogram\getting-started-histogram.csproj", "{92ED77A6-37B4-447D-B4C4-15DB005A589C}"
-EndProject
-Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "getting-started-observable-gauge", "docs\metrics\getting-started-gauge\getting-started-observable-gauge.csproj", "{E7F491CC-C37E-4A56-9CA7-8F77F59E0614}"
-EndProject
-Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "getting-started-observable-counter", "docs\metrics\getting-started-observable-counter\getting-started-observable-counter.csproj", "{43005998-0247-4620-AF88-27DACD48712E}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "learning-more-instruments", "docs\metrics\learning-more-instruments\learning-more-instruments.csproj", "{E7F491CC-C37E-4A56-9CA7-8F77F59E0614}"
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "getting-started", "docs\metrics\getting-started\getting-started.csproj", "{EA60B549-F712-4ABE-8E44-FCA83B78C06E}"
 EndProject
@@ -430,18 +426,10 @@ Global
 		{4D7201BC-7124-4401-AD65-FAB58A053D45}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{4D7201BC-7124-4401-AD65-FAB58A053D45}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{4D7201BC-7124-4401-AD65-FAB58A053D45}.Release|Any CPU.Build.0 = Release|Any CPU
-		{92ED77A6-37B4-447D-B4C4-15DB005A589C}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{92ED77A6-37B4-447D-B4C4-15DB005A589C}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{92ED77A6-37B4-447D-B4C4-15DB005A589C}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{92ED77A6-37B4-447D-B4C4-15DB005A589C}.Release|Any CPU.Build.0 = Release|Any CPU
 		{E7F491CC-C37E-4A56-9CA7-8F77F59E0614}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
 		{E7F491CC-C37E-4A56-9CA7-8F77F59E0614}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{E7F491CC-C37E-4A56-9CA7-8F77F59E0614}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{E7F491CC-C37E-4A56-9CA7-8F77F59E0614}.Release|Any CPU.Build.0 = Release|Any CPU
-		{43005998-0247-4620-AF88-27DACD48712E}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{43005998-0247-4620-AF88-27DACD48712E}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{43005998-0247-4620-AF88-27DACD48712E}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{43005998-0247-4620-AF88-27DACD48712E}.Release|Any CPU.Build.0 = Release|Any CPU
 		{EA60B549-F712-4ABE-8E44-FCA83B78C06E}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
 		{EA60B549-F712-4ABE-8E44-FCA83B78C06E}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{EA60B549-F712-4ABE-8E44-FCA83B78C06E}.Release|Any CPU.ActiveCfg = Release|Any CPU
@@ -485,9 +473,7 @@ Global
 		{972396A8-E35B-499C-9BA1-765E9B8822E1} = {77C7929A-2EED-4AA6-8705-B5C443C8AA0F}
 		{08D29501-F0A3-468F-B18D-BD1821A72383} = {5B7FB835-3FFF-4BC2-99C5-A5B5FAE3C818}
 		{64E3D8BB-93AB-4571-93F7-ED8D64DFFD06} = {5B7FB835-3FFF-4BC2-99C5-A5B5FAE3C818}
-		{92ED77A6-37B4-447D-B4C4-15DB005A589C} = {3277B1C0-BDFE-4460-9B0D-D9A661FB48DB}
 		{E7F491CC-C37E-4A56-9CA7-8F77F59E0614} = {3277B1C0-BDFE-4460-9B0D-D9A661FB48DB}
-		{43005998-0247-4620-AF88-27DACD48712E} = {3277B1C0-BDFE-4460-9B0D-D9A661FB48DB}
 		{EA60B549-F712-4ABE-8E44-FCA83B78C06E} = {3277B1C0-BDFE-4460-9B0D-D9A661FB48DB}
 		{A885DBE2-4B82-432C-A77B-19844D7BBC96} = {0169B149-FB8B-46F4-9EF7-8A0E69F8FAAF}
 		{1F9D7748-D099-4E25-97F5-9C969D6FF969} = {3277B1C0-BDFE-4460-9B0D-D9A661FB48DB}

docs/metrics/getting-started-histogram/Program.cs → docs/metrics/learning-more-instruments/Program.cs

@@ -15,6 +15,8 @@
 // </copyright>
 
 using System;
+using System.Collections.Generic;
+using System.Diagnostics;
 using System.Diagnostics.Metrics;
 using OpenTelemetry;
 using OpenTelemetry.Metrics;
@@ -30,12 +32,33 @@ public static void Main(string[] args)
             .AddConsoleExporter()
             .Build();
 
+        var process = Process.GetCurrentProcess();
+
+        MyMeter.CreateObservableCounter<double>("Thread.CpuTime", () => GetThreadCpuTime(process), "seconds");
+
+        MyMeter.CreateObservableGauge<int>("Thread.State", () => GetThreadState(process));
+
         var random = new Random();
         var histogram = MyMeter.CreateHistogram<long>("MyHistogram");
+        for (int i = 0; i < 1000; i++)
+        {
+            histogram.Record(random.Next(1, 1000));
+        }
+    }
 
-        for (int i = 0; i < 20000000; i++)
+    private static IEnumerable<Measurement<double>> GetThreadCpuTime(Process process)
+    {
+        foreach (ProcessThread thread in process.Threads)
+        {
+            yield return new(thread.TotalProcessorTime.TotalMilliseconds, new("ProcessId", process.Id), new("ThreadId", thread.Id));
+        }
+    }
+
+    private static IEnumerable<Measurement<int>> GetThreadState(Process process)
+    {
+        foreach (ProcessThread thread in process.Threads)
         {
-            histogram.Record(random.Next(1, 1000), new("tag1", "value1"), new("tag2", "value2"));
+            yield return new((int)thread.ThreadState, new("ProcessId", process.Id), new("ThreadId", thread.Id));
         }
     }
 }

docs/metrics/learning-more-instruments/README.md

@@ -0,0 +1,3 @@
+# Learning more about Instruments
+
+TBD