Declare and assign variables together

Author: edwardneal

src/Microsoft.Data.SqlClient/tests/UnitTests/Microsoft/Data/SqlClient/UdtSerialization/NativeSerializationTest.cs

@@ -260,14 +260,13 @@ public void CannotSerializeNonPrimitiveType()
     private static void RoundtripType(object inputValue, byte[] expectedValue)
     {
         using MemoryStream stream = new();
-        object readPrimitive;
         int typeSize = SerializationHelperSql9.SizeInBytes(inputValue.GetType());
         int objectSize = SerializationHelperSql9.SizeInBytes(inputValue);
         int maxTypeSize = SerializationHelperSql9.GetUdtMaxLength(inputValue.GetType());
 
         SerializationHelperSql9.Serialize(stream, inputValue);
         stream.Seek(0, SeekOrigin.Begin);
-        readPrimitive = SerializationHelperSql9.Deserialize(stream, inputValue.GetType());
+        object readPrimitive = SerializationHelperSql9.Deserialize(stream, inputValue.GetType());
 
         // For native formatting, the type size, the object size and the maximum object size will always be identical
         Assert.Equal(typeSize, objectSize);

src/Microsoft.Data.SqlClient/tests/UnitTests/Microsoft/Data/SqlClient/UdtSerialization/UserDefinedSerializationTest.cs

@@ -65,16 +65,14 @@ private static void RoundtripType<T>(T userObject)
         where T : IFormattingProgress
     {
         using MemoryStream stream = new();
-        byte[] serializedValue;
-        T readInstance;
         int typeSize = SerializationHelperSql9.SizeInBytes(userObject.GetType());
         int objectSize = SerializationHelperSql9.SizeInBytes(userObject);
         int maxTypeSize = SerializationHelperSql9.GetUdtMaxLength(userObject.GetType());
 
         SerializationHelperSql9.Serialize(stream, userObject);
-        serializedValue = stream.ToArray();
         stream.Seek(0, SeekOrigin.Begin);
-        readInstance = (T)SerializationHelperSql9.Deserialize(stream, userObject.GetType());
+        byte[] serializedValue = stream.ToArray();
+        T readInstance = (T)SerializationHelperSql9.Deserialize(stream, userObject.GetType());
 
         // If this is a struct, it will have been copied by value and the write to WriteInvoked will have been made
         // to another copy of our object