const string connectionUri = @"https://axae1paymentdvchksvcs-cosmosdb.documents.azure.com:443/";

const string connectionKey = @"XNz7JrNApltiqBxozhRH4csinAwVHyswboXTaU6QEaExAQq0Jv6HtGAfkUxqTvmLLUpLbdL5cxKDxe4t3XrAfw==";

const string connectionString = "AccountEndpoint=https://axae1paymentdvchksvcs-cosmosdb.documents.azure.com:443/;AccountKey=XNz7JrNApltiqBxozhRH4csinAwVHyswboXTaU6QEaExAQq0Jv6HtGAfkUxqTvmLLUpLbdL5cxKDxe4t3XrAfw==;";

​

var interpOnly = $"AccountEndpoint={connectionUri};AccountKey={connectionKey};";

var verbatimAndInterp = $@"AccountEndpoint={connectionUri};AccountKey={connectionKey};";

​

System.Console.WriteLine($"Interp. only: {interpOnly}");

System.Console.WriteLine($"Verbatim and Interp.: {verbatimAndInterp}");

​

System.Console.WriteLine($"Matches? {interpOnly == connectionString}");

System.Console.WriteLine($"Matches? {verbatimAndInterp == connectionString}");

​