Improve split key=value

Author: thohng

src/NetLah.Extensions.Configuration/MapConfigurationProvider.cs

@@ -53,11 +53,14 @@ private void InternalLoad()
         void TryParse(string keyValue)
         {
             var pos = keyValue.IndexOf('=');
-            var key1 = keyValue[..pos];
-            var key2 = keyValue[(pos + 1)..];
-            if (configuration[key1] is { } value)
+            if (pos > 0 && pos < keyValue.Length - 1)
             {
-                Data[key2] = value;
+                var key1 = keyValue[..pos];
+                var key2 = keyValue[(pos + 1)..];
+                if (configuration[key1] is { } value)
+                {
+                    Data[key2] = value;
+                }
             }
         }
     }

src/NetLah.Extensions.Configuration/TransformConfigurationProvider.cs

@@ -62,9 +62,12 @@ private void InternalLoad()
         void TryParse(string prefix, string keyValue)
         {
             var pos = keyValue.IndexOf('=');
-            var key = keyValue[..pos];
-            var value = keyValue[(pos + 1)..];
-            Data[prefix + key] = value;
+            if (pos > 0 && pos < keyValue.Length - 1)
+            {
+                var key = keyValue[..pos];
+                var value = keyValue[(pos + 1)..];
+                Data[prefix + key] = value;
+            }
         }
     }
 }