Only run the cert validation on 45 or netstandard 2.0

This is to prevent issues when running on the < .net Core 2.0 runtime xplat

Author: niemyjski

build/sourcelink.props

@@ -4,6 +4,6 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="SourceLink.Embed.AllSourceFiles" Version="2.8.1" PrivateAssets="all" />
+    <PackageReference Include="SourceLink.Embed.AllSourceFiles" Version="2.8.3" PrivateAssets="all" />
   </ItemGroup>
 </Project>

src/Exceptionless/Configuration/CertificateData.cs

@@ -1,4 +1,5 @@
-#if !PORTABLE && !NETSTANDARD1_2
+#if NET45 || NETSTANDARD2_0
+using System;
 using System.Net.Http;
 using System.Net.Security;
 using System.Security.Cryptography.X509Certificates;
@@ -43,9 +44,7 @@ private CertificateData(X509Chain chain, SslPolicyErrors sslPolicyErrors) {
         /// An object that contains state information for this validation.
         /// </summary>
         public object Sender { get; }
-#endif
-
-#if !NET45 && !PORTABLE && !NETSTANDARD1_2
+#else
         /// <summary>
         /// The request which was sent to the remore party
         /// </summary>

src/Exceptionless/Configuration/ExceptionlessConfiguration.cs

@@ -277,7 +277,7 @@ public int SubmissionBatchSize {
             }
         }
 
-#if !PORTABLE && !NETSTANDARD1_2
+#if NET45 || NETSTANDARD2_0
         /// <summary>
         /// Callback which is invoked to validate the exceptionless server certificate.
         /// </summary>

src/Exceptionless/Extensions/ExceptionlessConfigurationExtensions.cs

@@ -436,15 +436,17 @@ private static string GetEnvironmentalVariable(string name) {
         }
 #endif
 
-#if !PORTABLE && !NETSTANDARD1_2
+#if NET45 || NETSTANDARD2_0
         /// <summary>
         /// Add a custom server certificate validation against the thumbprint of the server certificate.
         /// </summary>
         /// <param name="config">The configuration object you want to apply the attribute settings to.</param>
         /// <param name="thumbprint">Thumbprint of the server certificate. <example>e.g. "86481791CDAF6D7A02BEE9A649EA9F84DE84D22C"</example></param>
         public static void TrustCertificateThumbprint(this ExceptionlessConfiguration config, string thumbprint) {
             config.ServerCertificateValidationCallback = x => {
-                if (x.SslPolicyErrors == SslPolicyErrors.None) return true;
+                if (x.SslPolicyErrors == SslPolicyErrors.None)
+                    return true;
+
                 return x.Certificate != null && thumbprint != null && thumbprint.Equals(x.Certificate.Thumbprint, StringComparison.OrdinalIgnoreCase);
             };
         }
@@ -456,12 +458,17 @@ public static void TrustCertificateThumbprint(this ExceptionlessConfiguration co
         /// <param name="thumbprint">Thumbprint of the ca certificate. <example>e.g. "afe5d244a8d1194230ff479fe2f897bbcd7a8cb4"</example></param>
         public static void TrustCAThumbprint(this ExceptionlessConfiguration config, string thumbprint) {
             config.ServerCertificateValidationCallback = x => {
-                if (x.SslPolicyErrors == SslPolicyErrors.None) return true;
-                if (x.Chain == null || thumbprint == null) return false;
+                if (x.SslPolicyErrors == SslPolicyErrors.None)
+                    return true;
+
+                if (x.Chain == null || thumbprint == null)
+                    return false;
+
                 foreach (var ca in x.Chain.ChainElements) {
                     if (thumbprint.Equals(ca.Certificate.Thumbprint, StringComparison.OrdinalIgnoreCase))
                         return true;
                 }
+
                 return false;
             };
         }

src/Exceptionless/Submission/DefaultSubmissionClient.cs

@@ -4,7 +4,7 @@
 using System.Net;
 using System.Net.Http;
 using System.Net.Http.Headers;
-#if NET45 || (!PORTABLE && !NETSTANDARD1_2)
+#if NET45 || NETSTANDARD2_0
 using System.Net.Security;
 using System.Security.Cryptography.X509Certificates;
 #endif
@@ -130,13 +130,13 @@ protected virtual HttpClient CreateHttpClient(ExceptionlessConfiguration config)
 #else
             var handler = new HttpClientHandler { UseDefaultCredentials = true };
 #endif
-#if !PORTABLE && !NETSTANDARD1_2
+#if NET45 || NETSTANDARD2_0
             var callback = config.ServerCertificateValidationCallback;
             if (callback != null) {
 #if NET45
-                handler.ServerCertificateValidationCallback = (s,c,ch,p)=>Validate(s,c,ch,p,callback);
+                handler.ServerCertificateValidationCallback = (s,c,ch,p) => Validate(s,c,ch,p,callback);
 #else
-                handler.ServerCertificateCustomValidationCallback = (m,c,ch,p)=>Validate(m,c,ch,p,callback);
+                handler.ServerCertificateCustomValidationCallback = (m,c,ch,p) => Validate(m,c,ch,p,callback);
 #endif
             }
 #endif
@@ -157,7 +157,7 @@ protected virtual HttpClient CreateHttpClient(ExceptionlessConfiguration config)
             return client;
         }
 
-#if !PORTABLE && !NETSTANDARD1_2
+#if NET45 || NETSTANDARD2_0
 #if NET45
         private bool Validate(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors sslPolicyErrors, Func<CertificateData, bool> callback) {
             var certData = new CertificateData(sender, certificate, chain, sslPolicyErrors);